1Melt the butter in a small dish. Add the peanut butter and mix well.
In the mug, mix together the vanilla, egg, and sugar until well combined.
2Combine the flour, cocoa, salt, and baking powder and add to the mug.
3Pour in the peanut butter/butter mixture and mix well. Stir in the chocolate chips
4Put in the microwave for 1-2 minutes or until desired doneness is reached (all microwaves are different so you might have to experiment a little. I only do it for about 1 minute). Top with peanut butter pie mousse and hot fudge.
5Top with peanut butter pie mousse and hot fudge.
6TOPPING: Mix together the cream cheese, peanut butter, and vanilla. Fold in the whipped cream. Sift in the powdered sugar (I just used a fork) and fold that in too, trying not to over stir. Then put on hot fudge however much you like.