1
Cream butter and sugars together until light and fluffy, about 3-4 minutes.
2
Mix in peanut butter, egg and vanilla extract.
3
Add flour and baking soda and combine.
4
Stir in Reeses, peanut butter cups and chocolate chunks.
5
Preheat oven to 350 degrees. Line a 9 inch cake pan with parchment paper and grease the sides so that the cookie doesn't stick.
6
Press dough evenly into the pan cake.
7
Bake for 18-20 minutes, or until edges are slightly brown.
9
Remove cookie from oven and allow to cool for 15-20 minutes in pan.
10
Remove from pan carefully and allow to cool completely.
While cookie cools, make icing:
1
Beat the shortening and butter until smooth.
2
Slowly add 1 cup of powdered sugar. Mix until combined.
3
Mix in the vanilla extract and 1 tbsp water.
4
Add the cocoa and the rest of the powdered sugar and mix until smooth. Add more water to get the right consistency.
To finish:
1
When cookie cake has cooled, spread chocolate icing on the top.
2
Add Reese's to the top of the icing.
3
Drizzle chocolate sauce on top of Reese's.
4
Store in an airtight container.