In a high-powered blender, combine cottage cheese, unsweetened cocoa powder, your choice of sweetener, vanilla extract, and a pinch of salt. Pour in half of the milk and blend on high for about 1 minute until smooth.

Continue blending for an additional 2 minutes, scraping down the sides to ensure a silky texture.

Slowly add the remaining milk while blending on low to achieve your desired mousse consistency.

Taste and adjust sweetness if necessary, add any optional flavor boosters, and blend briefly.

Transfer mousse into serving bowls, cover, and refrigerate for at least 1 hour.

Remove from the fridge, garnish with toppings like whipped cream or berries, and serve.