Add the cottage cheese, cocoa powder, sweetener, and vanilla extract into a blender or food processor, making sure all ingredients are placed evenly so they blend smoothly without clumping.
Start blending on medium speed, then gradually increase to high speed, allowing the mixture to break down fully. Continue blending for 30–60 seconds, pausing to scrape down the sides with a spatula if needed, until the texture becomes completely smooth, creamy, and free of any graininess.
Check the consistency of the mixture. If it feels too thick or dense, add 1–2 tablespoons of milk and blend again for a few seconds until it reaches a silky, spoonable texture. Add the milk gradually so you don’t make it too thin.
Taste the mixture and adjust according to your preference. Add a little more sweetener if you want it sweeter or a small amount of cocoa powder if you prefer a deeper chocolate flavor, then blend briefly again to combine.
Once fully blended, transfer the mixture into a serving bowl and use the back of a spoon or spatula to smooth out the top, creating a clean and creamy finish.
Serve immediately if you prefer a softer, pudding-like texture, or place the bowl in the refrigerator for 20–30 minutes to allow it to thicken into a richer, mousse-like consistency before enjoying.