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We require at least 3 tested flavors before ranking a brand. KOS currently has 1 tested flavor. Check back once we've tested more flavors.
Flavor Spotlight
Rotates weekly
Strawberries & Cream
Plant-based protein powders often present texture challenges in a Creami, and this KOS strawberry powder exhibits common issues like chalkiness and grittiness. Achieving a smooth consistency required an extra splash of milk and an additional re-spin cycle, as the pint was initially dry and crumbly. The strawberry flavor is acceptable but not outstanding, tasting like a typical "natural flavor" rather than a rich, decadent experience.
Tested KOS Powders
1 testedFrequently Asked
Is KOS good for Ninja Creami?
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What is the best KOS flavor for Ninja Creami?
The best KOS flavor we've tested is Strawberries & Cream, scoring 4.6/10. It's our top pick from this brand for protein ice cream. See the full review →
How are KOS powders tested?
Every powder is tested using the same standardized recipe — Fairlife 2% milk, erythritol, xanthan gum — spun in the Ninja Creami NC301 on Lite Ice Cream mode. Scores reflect flavor quality, texture (smoothness, no graininess), and whether we'd buy a full tub again. See the recipe →
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Compare KOS against every other brand we've tested — ranked by flavor, texture, and macros.