01 - Combine peanut butter and cream cheese in a large mixing bowl. Beat with an electric mixer until smooth and creamy, ensuring no lumps remain.
02 - Add powdered sugar to the mixture and mix until fully incorporated and the texture is uniform.
03 - Gently fold in Cool Whip using a spatula with light, sweeping motions. Mix just until combined and airy—take care not to overmix or deflate the mixture.
04 - Distribute the mousse evenly among serving glasses or bowls, smoothing the tops with a spatula for a neat presentation.
05 - Refrigerate for at least 1 hour to allow the mousse to set and achieve optimal texture.
06 - Top with chopped roasted peanuts and chocolate shavings or mini chocolate chips just before serving, if desired.