Created by KittenCal on October 15, 2011
Step 1: Preheat oven to 350 degrees F.
Step 2: Grease a 13 x 9-inch baking pan.
Step 3: For the crust; in a large bowl cream the butter with sugar for about 3 minutes.
Step 4: Add in eggs and vanilla and beat until well blended (about 2 minutes).
Step 5: In a bowl sift the flour with baking powder, salt and cocoa powder; add to the creamed mixture then beat until blended.
Step 6: Mix in the nuts if using.
Step 7: Transfer/spread into baking pan.
Step 8: Bake 15-18 minutes.
Step 9: Remove from oven and immediately sprinkle the marshmallows over the hot crust; return to oven for 2-3 minutes.
Step 10: Using a sharp knife dipped in water spread the marshmallow evenly over the crust; cool for about 30 minutes or more.
Step 11: In a small saucepan (can do this in the microwave also) combine the chocolate chips with 3 tablespoons butter and peanut butter; stir over low heat until the chocolate chips are melted and combined with the butter and peanut butter.
Step 12: Remove from heat and stir in the Rice Krispies cereal.
Step 13: Dollup the mixture over the bars (the mixture does not have to cover the marshmallow completely).
Step 14: Refrigerate then cut into squares.