This recipe doesn't call for marshmallows, but when I make it I use them instead of the coconut. Hope this helps...
1/2 cup butter, no subs 2 squares unsweetened chocolate 1 cup sugar 3/4 cup all purpose flour 2 eggs, beaten
FROSTING 1 cup powdered sugar 1/3 cup creamy peanut butter 1 1/2 tsp vanilla 2-4 Tbsp milk
TOPPINGS 3/4 cup plain M&M's 1/2 cup flaked coconut, toasted (I use marshmallows) 1/2 cup chopped pecans, toasted
In a saucepan, over low heat, melt butter, chocolate and sugar. Remove from the heat;stir in flour untill smooth. Add the eggs and beat untill smooth. Spread onto a greased 12" pizza pan. Bake at 350 for 15 minutes or untill toothpick inserted comes out clean. Cool completely.
For frosting, in a mixing bowl beat sugar, peanut butter and vanilla and enough milk to achieve desired spraeding consistency. Spread over brownie crust. Top with M&M's, coconut, and nuts.