Step 1

Preheat oven to 350 degrees F (175 degrees C). Grease a 9x13 inch baking pan.

Step 2

In a small mixing bowl combine flour, cocoa, baking powder and salt.

Step 3

In a large bowl cream butter and sugar; beat in eggs and vanilla. Stir flour mixture into the creamed egg mixture. Spread batter into the greased 9x13 inch pan.

Step 4

Bake for 15 to 20 minutes.

Step 5

Sprinkle marshmallows over top of the baked bars; bake 3 minutes more. Cool.

Step 6

Place chocolate chips and peanut butter in a microwave safe bowl. Melt chocolate chips and peanut butter in a microwave on high until melted together. Cook one minute at a time, stirring after each minute.

Step 7

Stir cereal into the chocolate mixture. Spread the chocolate mixture over the cooled bars. Chill, cut into bars and refrigerate.