Blend the base: Add cottage cheese, Greek yogurt, protein powder, milk, sweetener, vanilla, almond extract, butter extract (if using), and a pinch of salt to a high-speed blender. Blend until completely smooth and glossy, 30–60 seconds.
Check sweetness and thickness: Taste and adjust sweetener.
If it’s too thick to blend smoothly, add a splash more milk. For extra body, blend in 1 tablespoon of dry vanilla pudding mix or a spoonful of cream cheese.
Fold in sprinkles: Pour the pudding into a bowl and gently fold in sprinkles with a spatula. Don’t overmix or the colors may bleed.
Chill: Cover and refrigerate for at least 30–60 minutes.
Chilling lets the flavors settle and the texture thicken.
Serve: Spoon into cups, top with extra sprinkles, and enjoy. For a party vibe, add light whipped cream and a candle.