01 - Combine peanut butter and softened cream cheese in a large mixing bowl. Beat with electric mixer until smooth and creamy.
02 - Add powdered sugar and mix until completely incorporated and no lumps remain.
03 - Gently fold in Cool Whip with spatula, mixing just until combined and airy. Avoid overmixing to maintain light texture.
04 - Divide mousse evenly among serving glasses or bowls.
05 - Refrigerate for at least 1 hour to allow mousse to set and achieve optimal texture.
06 - Top with chopped roasted peanuts and chocolate shavings or mini chocolate chips if desired.