
Ninja QB900B Master Prep
Score: 79/100
Black+Decker 3-in-1 8-Cup Food Processor Black
Score: 81/100Rankings

The BLACK+DECKER Easy Assembly 8-Cup Food Processor offers a powerful 450 W motor, three speed settings and a versatile set of attachments for chopping, slicing and shredding. Its finicky safety interlock and occasional leakage are notable drawbacks, especially for wet recipes. It is best suited for small-to-medium households that need batch-size capacity without a high-end price tag.

The Ninja QB900B Master Prep combines a 400-W motor, quad-blade system and interchangeable 48-oz pitcher with a 16-oz chopper bowl, providing strong blending and chopping performance. Its single-speed pulse operation and lightweight construction may limit precise texture control and perceived sturdiness. Great for small households needing a space-saving 2-in-1 blender and processor.
| Attribute | ![]() | ![]() |
|---|---|---|
400 W | 450 Wbest | |
0.473 L | 1.89 Lbest | |
| ↓ lower better | 1.814 kgbest | 2.449 kg |
4best | 3 | |
1 years | 2 yearsbest | |
9best | 3 | |
33.98 cm | 38.61 cmbest | |
15.97 cm | 22.1 cmbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Capacity & Performance(1) | ||
Bowl Capacity (L) | 0.473 L | 1.89 L |
Battery & Power(1) | ||
Motor Power (W) | 400 W | 450 W |
General(1) | ||
Warranty (years) | 1 years | 2 years |
Controls(2) | ||
Speed Settings | 4 | 3 |
Control Type | one-touch pulse | Touchpad |
Accessories(1) | ||
Number of Included Accessories | 9 | 3 |
Build & Design(6) | ||
Weight (kg) | 1.814 kg | 2.449 kg |
Height (cm) | 33.98 cm | 38.61 cm |
Width (cm) | 15.97 cm | 22.10 cm |
Depth (cm) | 22.0 cm | 21.59 cm |
Blade Material | stainless steel | Stainless steel |
Blade Type | quad blade | S-blade |

Products in the top-left offer the best value (high score, low price).

Professional reviewers highlight the Ninja QB900B's 400 W motor and Quad Blade system for superior ice crushing and uniform chopping, while praising the interchangeable pod for versatile prep. They note the convenience of dishwasher-safe parts and a compact footprint, but point out the lack of variable speed options and the occasional difficulty cleaning blade crevices.
Everyday users overwhelmingly praise the unit for its smooth blending, strong performance on daily smoothies, and space-saving design. Common themes include appreciation for the easy-to-clean top-motor layout and the ability to handle nuts and herbs, while the primary complaints revolve around blade cleaning and the perception of a lightweight, less solid feel.

“just set and twist”

“really easy to assemble, use, and clean”

“sharp blades for fast veggie/chopping tasks”



Professional reviewers commend the BLACK+DECKER 8-Cup Food Processor for its straightforward assembly, sharp blades, and versatile attachments, noting it delivers solid performance for everyday chopping, shredding, and pureeing tasks at a budget-friendly price. They also acknowledge limitations such as a finicky safety interlock, modest speed options, and reduced capability with very tough ingredients.
Everyday users consistently praise the processor's easy "set-and-twist" setup, effective stainless-steel blades, generous 8-cup capacity, and dishwasher-safe components that simplify cleanup. Common frustrations revolve around the sensitive interlock, occasional leakage, difficulty handling hard foods, and the appliance's size making storage a challenge.
