Preheat oven to 325

Sift together dry ingredients

Add oil coffee and milk and mix at medium speed for 2 minutes

Add eggs and vanilla and beat 2 more minutes

Line a muffin pan with paper cupcake cups

Pour batter into cups and bake in the oven for 30 minutes until firm

Prepare filling

Melt butter and peanut butter together in the microwave

Add graham cracker crumbs and powdered sugar and mix together

Refrigerate for 20-30 minutes

Once cupcakes are cool, use a small paring knife to remove a hole in the center and discard the tops

Roll just over a tablespoon of filling into a small ball and place into the hole

Prepare frosting

Beat butter and vanilla with an electric mixer until light and fluffy

Add peanut butter and mix until combined

Add powdered sugar in one cup increments

Add milk and beat until mixed

Frost filled cupcakes