Preheat oven to 350 degrees F.
Prepare chocolate cake mix according to package instructions and
pour into a lightly greased 9x13 cake pan, DO NOT BAKE - set
Melt butter on stove top until bubbly. Pour into mixing bowl and
beat the butter and cream cheese until smooth. Add the peanut
butter and vanilla extract, beat till smooth. Add one cup of
powdered sugar at a time to bowl, and beat until fully incorporated
and mixture becomes light and fluffy.
Scoop spoonfuls of the peanut butter mixture onto the chocolate
cake batter, all over. Sprinkle with the chocolate chips and peanut
Bake for 45-55 minutes or until the center is only slightly jiggly. Let
cool for 15 to 20 minutes before slicing and serving warm. Top with
ice cream if desired! Enjoy!