Add the cottage cheese, honey, chocolate protein powder, cocoa powder, and vanilla to a blender or food processor. Blend until completely smooth, stopping to scrape down the sides as needed.
Divide the mousse into serving cups and refrigerate for at least 1 hour to thicken.
Serve chilled with your favorite toppings if you like.
Blend until glossy: Keep blending until the mousse looks smooth and shiny with no cottage cheese texture left. Scrape the sides once so everything blends evenly.
Taste before chilling: Protein powders vary in sweetness, so taste and add a little more honey if needed.
Chill for the best texture: It thickens as it sits, so an hour in the fridge makes it feel more like mousse.
Plant-based adjustment: Plant-based powders often make it thicker, so add a small splash of milk only if your blender struggles.
Make it feel like dessert: A sprinkle of chocolate chips or a few berries on top makes it taste even more like a treat.