Ninja Single-Serve Pods & Grounds Specialty Coffee Maker review

The Ninja PB051 is a compact single-serve brewer for someone who wants to switch between loose grounds and a compatible pod, rather than keep a pot of coffee warm. It has seven grounds-size selections, four regular pod sizes, four brew styles and a side-mounted fold-away frother. That is a wider menu than a simple pod-only machine, but all its drinks still arrive one cup at a time: there is no carafe or warming plate. If most mornings call for a shared pot, a carafe model such as the CFP101 is a more natural fit.

Two brew routes share one basket

For grounds, the PB051 offers 6, 8, 10, 12, 14, 18 and 24 ounces; the pod route has 6, 8, 10 and 12-ounce selections. Those are the menu sizes, not a promise that every style dispenses exactly that much liquid. The owner's guide gives approximate outputs that vary by style and explains that the grounds absorb water. For Specialty, the size button is bypassed and the machine makes about four ounces of concentrated coffee. Treat that as a small concentrate for a milk drink, not as a four-ounce pod setting or an espresso shot.

Switching formats means moving between the Ninja Pod Adapter and the permanent grounds filter in the basket. Both parts are listed in the box, as are the removable 56-ounce reservoir, adjustable cup tray, scoop, adapter storage bin and frother whisk. The guide describes K-Cup pods, but also says to use only pods intended for the adapter and not to force one that does not fit. A reusable K-Cup filter is specifically incompatible with this adapter. The grounds path uses its permanent filter; the manual says not to add a paper filter. If you want a machine that accepts every capsule shape without checking, this is not a safe assumption to make from the general word “pods.”

Over Ice is not Cold Brew

Classic, Rich, Over Ice and Specialty are listed for both routes on the exact PB051 product page. The guide calls Over Ice a hot brew that goes into a serving cup filled to the top with ice, and warns that some ice will melt. It is an iced-coffee shortcut, not a cold-water steep. There is no documented grounds Cold Brew cycle here. That distinction matters if your “cold coffee” requirement means a slow or low-temperature extraction: the PB051 will not satisfy it simply because an Over Ice button is present.

Rich is the stronger brew-style choice; the guide says it uses less water and produces less coffee than Classic at the same selected grounds size. For a first run, the guide calls for priming the system with a 24-ounce water-only Classic cycle. It also recommends medium-ground coffee and cautions against fine or espresso grinds, which can drain slowly, leave sediment or cause an overflow. At higher elevations, run the documented calibration brew before the first coffee; the manual warns that skipping it can cause excessive steaming.

A frother, not a milk steamer

The small whisk folds away against the body and can be removed for cleaning. It froths hot or cold milk and milk alternatives, but it does not heat milk. For a hot drink, the manual instructs the user to warm the milk separately, then froth it. That is a useful shortcut for cappuccino-like drinks from the Specialty concentrate, yet it is not a manual steam wand and will not give you a way to heat water for tea. If integrated hot-water dispensing or steam-textured milk is essential, use those as hard requirements rather than assuming a frother supplies them.

Plan for the cleaning cycle

Several removable pieces are dishwasher-safe according to the guide: brew basket, permanent filter, pod adapter, reservoir, frother whisk, nozzle and scoop. The adapter storage bin is hand-wash only. The separate pod needle and removable nozzle need periodic checking for coffee residue; the guide recommends clearing a clogged needle and then rinsing with a water-only brew. This is more hands-on than dropping a used pod in a bin, especially if the household alternates between grounds and pods.

The machine signals when a clean cycle is needed. The descale cycle takes about 75 minutes and requires a vessel that can hold at least 56 ounces, followed by a 24-ounce water-only brew to flush the system. That is a real ownership cost in time and counter space. The manufacturer lists a one-year limited warranty for the U.S. model. I leave wattage out of the comparison: the current product page states 1,550 watts while the PB040/PB050-series guide says 1,500 watts, and the exact-model revision bridge is not resolved.

Who should choose it?

Choose the PB051 if you want one compact appliance for grounds and compatible pods, enjoy customizing a single serving, and will actually use Specialty concentrate or the built-in whisk. It is a particularly clear choice for an iced-coffee routine that uses either grounds or pods and a cup full of ice. The tall-travel-mug clearance is up to eight inches, while the tray adjusts or comes out for wider vessels.

Choose the Ninja CFP101 instead when a 12-cup glass carafe and warming plate matter alongside pods and grounds; that model trades the PB051’s one-cup footprint and whisk for a shared-pot route. If cold coffee has to include grounds-based Cold Brew as well as pod Over Ice, compare the Cuisinart SS-9: its manual documents separate recipes for those uses, including a 16-ounce grounds setting, though it has no carafe either. The PB051 can cover a small range of household routines, but it cannot be both a carafe machine and a genuine grounds-Cold-Brew brewer. Let those exclusions guide the choice as much as the list of styles.