Ninja Professional Plus Blender Duo with Auto-IQ (BN751) Review

Ever tried making a smoothie at home only to end up with half-blended fruit chunks floating in a watery mess? Or maybe you’ve attempted to crush ice, only for your blender to sound like it’s about to explode?

If you’ve been there, you know how frustrating it is to own a blender that just doesn’t do the job right. This is where the Ninja BN751 Professional Plus Blender comes in. With a 1400-watt motor, Total Crushing Blades, and preset Auto-iQ programs, it claims to handle tough ingredients effortlessly. But is it really that powerful, or just another overhyped kitchen gadget?

I put this blender through its paces—making smoothies, crushing ice, blending nut butters, and even comparing it to other popular blenders. If you’re looking for a no-nonsense, real-world review to help you decide if the Ninja BN751 is worth your money, keep reading.

Ninja Professional Plus Blender Duo Features and Specifications

The Ninja BN751 comes packed with features that make blending faster, easier, and more efficient. From its powerful motor to its intelligent preset functions, this machine is designed to take the guesswork out of blending.

Powerful 1400-Watt Motor

Blenders come in all power levels, but not all motors are built the same. A weak motor struggles with frozen fruit, ice, and fibrous ingredients, often leading to uneven blends, overheating, or even burning out. The Ninja BN751’s 1400-watt motor provides enough power to handle tough ingredients effortlessly.

This means:
✔ Smoothies with zero chunks of frozen fruit
✔ Crushed ice that actually turns into fine snow
✔ Nut butters without excessive scraping or overheating

Many standard blenders operate at 600–900 watts, which is fine for soft ingredients but struggles with tougher tasks. The extra power in the Ninja Professional Plus Blender Duo makes a noticeable difference, especially when blending thicker mixtures like frozen smoothies or nut-based sauces.

Total Crushing Blades: A Smarter Blending Design

Blade design is just as important as motor power. Most blenders have a single set of blades at the bottom, forcing you to stop and stir constantly. Ninja takes a different approach.

The Total Crushing Blades system features multiple stacked blades at different heights inside the pitcher. This unique design helps:
✔ Pull ingredients downward instead of letting them spin aimlessly
✔ Reduce the need for constant stirring or shaking the blender
✔ Ensure even blending from top to bottom

This setup is especially useful when working with ice, leafy greens, and thicker ingredients. Unlike traditional blenders that leave unblended chunks floating at the top, the BN751’s blade system ensures a smooth consistency without needing a tamper.

Large 72-Ounce Pitcher: Perfect for Big Batches

Size matters when you’re blending for more than one person. The 72-ounce BPA-free pitcher is large enough to make family-sized servings in a single blend.

🔹 Making smoothies for the whole family? No need for multiple batches.
🔹 Meal prepping? Blend a big batch of soup, sauce, or protein shakes at once.
🔹 Hosting a party? Easily whip up frozen margaritas or slushies for a crowd.

Since it’s made from BPA-free plastic, it’s safe for food use and lightweight compared to glass pitchers. Plus, it’s dishwasher safe, making cleanup much easier.

Auto-iQ Technology: Smarter Blending at the Touch of a Button

Not everyone wants to stand next to their blender, adjusting speeds and guessing when to stop. This is where Auto-iQ Technology makes a difference.

The Ninja BN751 comes with three preset blending programs that automatically adjust speed and blending patterns for optimal results:

• Smoothie Mode – Ideal for protein shakes, fruit smoothies, and green juices
• Ice Crush Mode – Perfect for making snow-like crushed ice for slushies and frozen drinks
• Extract Mode – Best for breaking down tough ingredients like kale, nuts, and seeds

These programs take out the guesswork by adjusting speed, pulsing, and blending time without needing manual input. Just press a button, and the blender does the rest.

Easy Cleaning: Dishwasher-Safe Parts

Nobody likes scrubbing a blender after making a thick smoothie. Thankfully, all detachable parts of the BN751—including the pitcher, blades, and lid—are dishwasher safe.

For quick cleanup, you can also:
✔ Fill the pitcher with warm water and a drop of dish soap
✔ Run it on high speed for 30 seconds
✔ Rinse and let it air dry

This simple self-cleaning method works well for everyday use, especially when dealing with sticky ingredients like nut butter or protein powder.

Performance Test: Does the Ninja BN751 Deliver?

Specs and features look great on paper, but real-world performance is what truly matters. Does the Ninja BN751 actually live up to its claims? I put it through a series of tests to see how well it handles smoothies, frozen ingredients, nut butter, and even crushing ice.

Smoothie Test: No More Chunks?

Smoothies are a daily habit for many, but nothing ruins the experience faster than unblended chunks of frozen fruit or leafy greens floating at the top. Some blenders struggle to create a silky texture, often requiring extra stirring or multiple blending cycles.

With the Ninja Professional Plus Blender Duo, I tested a classic banana, frozen strawberry, spinach, and almond milk smoothie.

Results:
✔ Completely smooth texture in under 60 seconds
✔ No large frozen fruit chunks left behind
✔ Spinach blended fully—no gritty texture or leafy bits

The Auto-iQ Smoothie Mode worked well here. Instead of just running at full speed, it pulsed strategically, ensuring all ingredients were pulled toward the blades.

Ice Crush Test: Fine Snow or Chunky Slush?

Many blenders claim to crush ice, but few actually do it well. Some leave uneven chunks, while others overheat or require excessive shaking.

Using the Ice Crush Mode, I added a full tray of ice cubes and let the BN751 run its cycle.

Results:
✔ Fine, snow-like texture—perfect for slushies or cocktails
✔ No large leftover ice chunks
✔ Blades didn’t jam or require manual intervention

This makes it a great choice for those who love making frozen margaritas, slushies, or shaved ice desserts. The stacked Total Crushing Blades clearly make a difference in achieving an even consistency.

Nut Butter Test: Can It Handle Thick Blends?

Blending almond butter or peanut butter is a real challenge for most blenders. Weak motors overheat, and traditional bottom-blade designs often leave dry pockets that require constant scraping.

For this test, I used roasted almonds with a little bit of oil to help the process.

Results:
✔ Fully blended into smooth, spreadable almond butter in about 2 minutes
✔ No overheating or burnt motor smell
✔ No excessive stopping or scraping needed

The 1400-watt motor had enough power to keep things moving, and the tall blade design helped pull ingredients down without leaving unprocessed chunks. While it’s not as fast as a high-end food processor, it does the job well for homemade nut butters, hummus, or thick dips.

Leafy Greens and Fibrous Ingredients Test

Some blenders struggle with fibrous ingredients like kale, celery, and ginger, leaving behind unpleasant stringy textures. I blended a green juice with kale, celery, apple, and ginger using the Extract Mode.

Results:
✔ No fibrous strands or gritty texture
✔ Fully liquefied greens—no need to strain
✔ Retained all the nutrients without excess foam

This makes it a solid option for green juice lovers who want smooth, pulp-free results without using a juicer.

Final Thoughts on Performance

From smoothies to nut butters, the Ninja Professional Plus Blender Duo handled everything I threw at it. Its Auto-iQ technology, high power, and unique blade design worked together to deliver consistent, smooth blends across different ingredients.

Pros and Cons: Is the Ninja Professional Plus Blender Duo Worth It?

Every blender has strengths and weaknesses, and the Ninja BN751 is no exception. While it excels in many areas, there are a few things to keep in mind before making a purchase. Here’s a detailed breakdown of what works well and what could be better.

What the Ninja BN751 Gets Right

1. Powerful 1400-Watt Motor Handles Tough Ingredients

One of the biggest complaints with budget blenders is their inability to blend ice, frozen fruit, and tough greens properly. The BN751’s 1400-watt motor has no such problem, making it a solid choice for those who love thick smoothies, frozen drinks, and homemade nut butters.

✔ No struggling or overheating
✔ Easily blends ice, nuts, and leafy greens
✔ Ideal for protein shakes, thick smoothies, and meal prep

2. Auto-iQ Technology Makes Blending Effortless

Most blenders require manual speed adjustments, which can be frustrating when dealing with thicker or uneven blends. The BN751’s Auto-iQ programs adjust speed and blending patterns automatically, taking out the guesswork.

✔ Smoothie Mode for perfectly blended drinks
✔ Ice Crush Mode for frozen treats
✔ Extract Mode for nutrient-packed juices

Instead of babysitting the blender, you can press a button and let it do the work.

3. Large 72-Ounce Pitcher for Big Batches

If you’re blending for a family, meal prepping, or making party drinks, the extra-large 72-ounce pitcher is a major plus.

✔ Perfect for multiple servings
✔ No need for multiple blending cycles
✔ BPA-free and dishwasher safe for easy cleanup

Many budget blenders max out at 32 to 48 ounces, which isn’t enough for larger batches.

4. Easy to Clean (Dishwasher Safe Parts)

A powerful blender isn’t worth much if cleaning it is a hassle. The BN751’s pitcher, blades, and lid are all dishwasher safe, making cleanup simple.

✔ Quick rinse option: Add warm water + soap and blend for 30 seconds
✔ No need for scrubbing hard-to-reach corners

Compared to some blenders that require painstaking disassembly, this one is straightforward to clean.

Where the Ninja BN751 Falls Short

1. No Tamper for Thick Blends

Blenders like the Vitamix come with a tamper, which helps push ingredients down while blending. The BN751 doesn’t have one, which means you may need to:

❌ Stop and scrape down the sides for thick blends
❌ Add extra liquid to keep things moving

This can be frustrating for those who regularly make thick nut butters or frozen smoothie bowls.

2. No Variable Speed Control

Some high-end blenders allow precise speed adjustments, but the BN751 relies on preset programs and fixed speeds. While the Auto-iQ modes work well, they may not offer the same control as manual speed dials found on premium blenders.

❌ No fine-tuning for specific textures
❌ Limited control for manual blending

For most users, this won’t be a major issue, but those who like to tweak speed settings might find it limiting.

3. Can Be Loud at Full Power

Powerful motors tend to be noisy, and the BN751 is no exception.

❌ Louder than lower-powered blenders
❌ Can be disruptive early in the morning or in shared living spaces

While it’s not unbearably loud, expect some noise when crushing ice or blending frozen ingredients.

Final Thoughts on Pros and Cons

The Ninja BN751 excels at powerful blending, smart presets, and easy cleaning, making it a strong contender in its price range. However, the lack of a tamper, limited speed control, and noise level are things to consider.

Ninja BN751 vs. Competitors: How Does It Compare?

The Ninja BN751 offers impressive power and smart blending features, but how does it stack up against other popular blenders in the same price range? Let’s compare it to three major competitors:

• Vitamix E310 (a premium option)
• NutriBullet ZNBF30500Z (a mid-range competitor)
• Oster Pro 1200 (a budget-friendly alternative)

Ninja BN751 vs. Vitamix E310 (Premium Choice)

Key Differences:

✔ The Vitamix E310 offers manual speed control and a tamper, making it better for thick blends like nut butters and frozen desserts.
✔ The Ninja BN751 has smart presets and a larger pitcher, making it more convenient for everyday use and batch blending.
✔ Price: The Vitamix is significantly more expensive, typically costing 3x more than the Ninja.

Verdict: If you need ultimate control and durability, the Vitamix is a better long-term investment, but if you want blending power at a more affordable price, the Ninja BN751 is the better deal.

Ninja BN751 vs. NutriBullet ZNBF30500Z (Mid-Range Option)

Key Differences:

✔ The Ninja BN751 is better for crushing ice and making frozen drinks, thanks to its Total Crushing Blades.
✔ The NutriBullet ZNBF30500Z is better for purees, sauces, and soups, with its smoother blending action.
✔ The NutriBullet lacks preset programs, requiring manual control.

Verdict: If you mainly make smoothies and frozen drinks, the Ninja BN751 wins, but if you want a more compact blender for sauces and hot soups, NutriBullet is worth considering.

Ninja BN751 vs. Oster Pro 1200 (Budget Pick)

Key Differences:

✔ The Ninja BN751 is more powerful and blends smoother.
✔ The Oster Pro 1200 has a glass pitcher, which some users prefer over plastic.
✔ The Oster is more affordable, but may not last as long.

Verdict: If you’re on a tight budget, the Oster Pro 1200 is a decent alternative, but if you want better performance and larger capacity, the Ninja BN751 is the smarter choice.

Final Thoughts on the Comparison

The Ninja BN751 holds its own against both premium and budget options. It’s more affordable than a Vitamix, more powerful than a NutriBullet, and better designed for ice crushing than an Oster.

User Experiences and Customer Feedback

Real-world experiences often reveal more than specs and comparisons ever can. What are actual users saying about the Ninja BN751? Let’s break down the common praises, complaints, and overall satisfaction levels based on customer reviews.

What Users Love About the Ninja BN751

1. Effortless Ice Crushing and Smooth Blends

Many users highlight how well the Ninja BN751 handles ice and frozen ingredients. Unlike lower-powered blenders that leave chunks behind, this one delivers consistently smooth results.

✅ “I make frozen margaritas all the time, and this blender turns ice into snow in seconds!”
✅ “No more gritty protein shakes—this thing blends everything silky smooth.”

Those who frequently make smoothies, frozen cocktails, and protein shakes appreciate the power.

2. Auto-iQ Programs Make Blending Easy

One of the most common praises is how simple and convenient the preset programs are. Users love that they don’t have to guess blend times or manually adjust speeds.

✅ “I just press the Smoothie button, and it does everything for me—perfect every time.”
✅ “Auto-iQ is a game-changer. No more stopping and starting!”

For those who want a hassle-free blending experience, the one-touch buttons are a major plus.

3. Large Capacity is Perfect for Families and Meal Prepping

Many users point out that the 72-ounce pitcher is great for big batches, whether it’s smoothies for a family or prepping sauces and soups for the week.

✅ “I can blend enough for my whole family in one go—no need for multiple batches.”
✅ “Perfect for meal prepping! I blend a week’s worth of smoothie ingredients in one shot.”

If you regularly blend in large quantities, this is a big advantage.

Common Complaints and Drawbacks

1. Loud Operation at Full Power

This is probably the most frequent complaint. The 1400-watt motor is powerful, but it’s not quiet.

❌ “Sounds like a jet engine when crushing ice.”
❌ “Wish it was a little quieter, especially in the morning.”

While it’s not any louder than other high-powered blenders, those who need a quiet appliance may want to keep this in mind.

2. No Tamper for Thick Blends

Users who make thicker recipes like nut butters or smoothie bowls sometimes find themselves stopping to scrape down the sides.

❌ “Would be nice if it had a tamper like the Vitamix for thicker blends.”
❌ “Sometimes I have to add extra liquid to keep things moving.”

For those who blend a lot of dense ingredients, a tamper would help.

3. Durability and Long-Term Performance

While most users report great initial performance, a few mention concerns about long-term durability.

❌ “Works great, but after a year, the pitcher started showing wear.”
❌ “The lid feels a little flimsy compared to high-end blenders.”

Since the BN751 is more affordable than premium blenders, some trade-offs in material quality are expected.

What We Can Take Away from User Reviews

The Ninja BN751 is widely praised for its power, ease of use, and large capacity, but a few minor complaints about noise, lack of a tamper, and long-term durability exist.

Now, let’s put all of this into perspective, where we weigh everything we’ve covered to determine if this blender is the right choice for you.

Final Verdict: Is the Ninja BN751 Worth It?

Alright, we’ve gone through everything—the features, performance, comparisons, and real customer feedback. Now, let’s pull it all together and see if the Ninja BN751 is the right blender for you.

Who Should Buy the Ninja BN751?

✔ You love smoothies, frozen drinks, or protein shakes. This blender excels at crushing ice and blending frozen ingredients into a silky smooth texture. If you make smoothies daily, this is a solid choice.

✔ You want a powerful blender without spending a fortune. The BN751 gives you 1400 watts of power and smart features at a price that’s far lower than premium blenders like Vitamix.

✔ You need a large-capacity blender. If you’re blending for a family or meal prepping, the 72-ounce pitcher saves you time by making big batches in one go.

✔ You appreciate convenience. The Auto-iQ programs take the guesswork out of blending, so you can press a button and let the blender do the rest.

Who Might Want to Look Elsewhere?

❌ You need a blender for thick blends like nut butter or smoothie bowls. Without a tamper, you might have to stop and scrape down the sides. A Vitamix or a high-end blender with a tamper would be better for that.

❌ You want a super quiet blender. Let’s be real—this thing is loud, especially when crushing ice. If noise is a dealbreaker, you might prefer a lower-powered option.

❌ You’re looking for a premium, long-term investment. While the BN751 is well-built, Vitamix and Blendtec blenders last longer and come with better warranties. If you want a blender for the next 10+ years, it might be worth spending more.

Final Thoughts

The Ninja BN751 is a fantastic mid-range blender that delivers impressive power, large capacity, and easy-to-use features at a price that won’t break the bank. It’s perfect for smoothie lovers, families, and anyone who wants powerful blending without paying premium prices.

That said, if you need manual speed control, a tamper, or a quieter operation, you might want to explore other options. But for everyday blending, frozen drinks, and meal prep, the BN751 is one of the best choices in its price range.

So, what do you think? Does this sound like the blender for you, or you prefer to go with another Ninja Blender?