1/4 c. (1/2 stick butter)
1/2 c. sugar
2 eggs
1/2 c. flour
1/2 tsp. baking powder
1/2 tsp. vanilla
1 c. chocolate syrup Cream butter and sugar; add eggs and beat until fluffy. Add sifted dry ingredients, vanilla and chocolate syrup. Beat until thoroughly blended. Pour into an 8-inch square or round glass baking dish. Cook, uncovered, 7 minutes in microwave oven. FROSTING: While cake is still warm, spread 1 cup miniature marshmallows over the top. In microwave oven, melt 2 tablespoons butter for 30 seconds in glass mixing bowl. Add 1/2 cup sugar and 2 tablespoons evaporated milk; mix thoroughly. Cook uncovered, for 2 minutes. Quickly mix in 1/4 cup chocolate chips and 1/2 teaspoon vanilla. Pour over cake and blend with marshmallows. Microwave cooking times are approximate. Cooking time varies with the model of microwave oven. | 
