Ingredients
1 stick unsalted butter
2-3 squares baking chocolate
2 cups sugar
4 eggs
1 cup flour
1 teaspoon vanilla
1 cup chocolate chips
2 cups mini marshmallows
Preparation
Preheat oven to 350.
Melt butter and baking sqaures in a microwave safe bowl. In the mixing bowl, cream melted butter and chocolate mixture. Add in sugar and vanilla and beat until fluffy, about 2-3 minutes. Add in eggs, beating one at a time. Add flour and stir just until combined. Fold in chocolate chips. Fold in marshmallows.
Pour into greased 9 x 13 baking dish (I used a 10 x 10 square cake pan). Bake for 35-45 minutes, or until just barely done.