What is the Ninja PB051?
A pod machine that would rather you used loose coffee, with a frother bolted on.
Ninja publishes four brew styles named Classic, Rich, Over Ice and Specialty, compatibility with both K-Cup pods and loose grounds, cup sizes up to 24oz, a built-in milk frother, a 1.6 litre removable fold-away reservoir, and its Thermal Flavor Extraction system, which the maker credits for consistent temperature, even saturation and calibrated brewing cycles. It measures 5.51 by 13.07 by 13.31 inches.
What the four brew styles are actually doing
All four change the water, not the coffee. Knowing which is which stops you buying the wrong one.
Classic and Rich are the same dose at different flow rates, the way a strong brew button works on a K-Elite. Rich is slower and more concentrated, intended to survive milk.
Over Ice brews hotter and shorter so the drink is deliberately over-strength before the ice dilutes it. This is the setting people misunderstand: it is not cold brew and it is not a chilled machine. It is a concentrated hot brew designed to arrive at normal strength once melted.
Specialty is the smallest and most concentrated of the four, meant as an espresso substitute for a latte. It is brewed under gravity at drip pressure, so it is not espresso and it will not build crema. If a real shot matters, that is what an espresso machine is for.
The frother is the reason to pick this over a Keurig
No machine in the Keurig range on this site has one.
Pair the Specialty setting with the fold-out frother and you have a latte-shaped drink from one appliance without a separate standalone milk frother on the counter. It is a foam wand rather than a steam wand, so it aerates cold or warm milk rather than texturing it with steam, and the result is airier and less glossy than a cafe cappuccino.
Judged against a Creatista Plus it is not close. Judged against every K-Cup machine, which offers no milk system at all, it is a genuine feature.
Ninja PB051 vs Hamilton Beach FlexBrew Trio
Two hybrids that both take grounds, and they diverge on volume.
The FlexBrew Trio adds a 12 cup carafe, so it serves a table. The Ninja does not brew a pot at all.
What the Ninja has instead is the brew styles and the frother, which are about making one better or more interesting cup rather than more cups. A household wanting a weekend pot should take the Hamilton Beach; one person wanting an iced coffee in July and a latte in January should take this.
Is the Ninja PB051 worth it?
Worth it if you will use the grounds basket and the frother. Otherwise you are paying for buttons.
Bought as a pod machine and used only with pods, it costs more than a K-Classic and brews the same pod. Bought as a machine that replaces a pod habit and a frother, it is good value.
Ninja publishes no wattage, no warranty term and no brew time on this listing. Thermal Flavor Extraction is the maker's own name for its temperature and saturation control, and there is no independent figure behind it to quote, so treat it as a claim rather than a measurement.
Who should buy it (and who should not)
Buy it for one person who wants variety rather than volume.
It suits somebody who drinks iced coffee in summer, wants a milk drink without a second appliance, and would rather use a bag of grounds than a box of pods on most days.
Do not buy it if you need a full pot, and do not buy the Specialty setting as espresso, because it is a strong drip and will not behave like a shot.
Frequently Asked Questions
Does the Ninja PB051 take K-Cups?
Yes, and it also brews loose grounds from its own basket, with no separate reusable pod needed.
Is the Specialty setting espresso?
No. It is a very concentrated drip brew intended as a base for milk drinks. There is no pump and no crema.
What does Over Ice do?
Brews hotter and stronger than normal so the drink is at proper strength once poured over ice rather than watery.
Does it froth milk?
Yes, a built-in fold-out frother. It aerates rather than steams, so the foam is airier than a wand's.
What is the largest cup it makes?
24oz.
