Mix together 7-up, buttermilk, bisquick to smooth dough. Dip hand into just enough more bisquick you can knead dough in bowl till smooth and elastic. Shape dough into 6 patties of equal size, 1" thick & place 1 patty in center of a greased 9" round layer pan. Arrange the other patties around that. Wipe tops of each in a dab of butter or margarine. Bake at 450F- (very hot oven) 18-20 minutes or till triple in size & golden bown. Cool in pan 10 minutes before serving. Makes 6 McFabulous flaky biscuits.