4 oz. (2/3 c.) semi-sweet chocolate chips
2 sticks butter
2 c. sugar
4 room temp. eggs
1 c. plain flour
1 tsp. vanilla
2 c. mini marshmallows
1 c. semi-sweet chocolate chips
1 c. chopped pecans or walnuts

In microwaveable bowl, melt 4 ounce (2/3 cup) semi-sweet chocolate chips and 2 sticks butter. Add 2 cups sugar, stirring well. Beat in each of the 4 eggs, beating well with each addition. Stir in flour, vanilla, mini marshmallows, 1 cup semi-sweet chocolate chips and walnuts or pecans. Pour evenly into a well greased 13x9 inch pan. Bake 40-45 minutes (until almost set) at 350 degrees. When cool, cut into squares.