This peanut butter chocolate mousse cake is a light and airy dessert that is perfect for those who want a less indulgent option. The cake layers are made with cocoa powder and buttermilk, which gives them a tender crumb and a subtle tang. The mousse filling is made with whipped cream, smooth peanut butter, and melted chocolate, which adds a rich and creamy texture to the cake. The cake is then topped with chopped peanuts and chocolate chips for an extra crunch. This cake is perfect for those who love the combination of chocolate and peanut butter but want a lighter option.