In a blender or food processor, combine the cottage cheese, peanut butter, sweetener, vanilla extract, and optional salt. Blend until smooth and creamy, scraping down the sides as needed.
If the mixture is too thick, add 1–2 tablespoons of milk or heavy cream, one tablespoon at a time, blending until you reach your desired mousse-like consistency.
Taste the mousse and adjust the sweetness or saltiness if needed. Add more sweetener for a sweeter flavor or a pinch more salt to balance the richness of the peanut butter.
For an even creamier texture, transfer the mousse to a bowl, cover it, and refrigerate for 15–30 minutes before serving.
Divide the mousse into small bowls or jars. Serve as-is or top with additional toppings like crushed peanuts, a drizzle of peanut butter, fresh fruit, or chocolate shavings for extra indulgence.
