Cake:
1 box devil’s food cake mix
1 small package instant chocolate pudding mix
1 cup sour cream
1 cup vegetable oil
4 eggs
1/2 cup milk
1 tsp vanilla

Chocolate Mousse:
2 cups milk chocolate chips
2 cups heavy whipping cream

Chocolate Buttercream:
1 stick butter, room temperature
1/2 tsp vanilla
2 1/2 cups powdered sugar
1/4 cup cocoa powder

3 Regular sized Snickers