01 - Combine the peanut butter and softened cream cheese in a large mixing bowl. Beat with an electric mixer until the mixture achieves a smooth, creamy consistency.
02 - Add the powdered sugar to the bowl and mix until completely blended and no lumps remain.
03 - Gently fold the thawed Cool Whip into the peanut butter mixture using a spatula. Mix just until combined and the mixture becomes light and airy, taking care not to overmix.
04 - Divide the mousse evenly among individual serving glasses or bowls.
05 - Refrigerate the mousse for at least 1 hour to allow it to set and achieve the ideal texture.
06 - Sprinkle with chopped roasted peanuts and chocolate shavings or mini chocolate chips just before serving, if desired.