3. Grease and lightly flour an 8x8x2-inch baking pan. Melt chocolate and butter; cool. Stir together flour, baking powder, and ¼ teaspoon salt. In a mixer bowl beat 2 eggs and 1 teaspoon of the vanilla; gradually add ¾ cup of the sugar. Continue beating eggs till thick and lemon colored. Add dry ingredients to egg mixture; beat till well combined. Stir in chocolate mixture. Beat cheese and remaining ¼ cup sugar till fluffy. Stir in remaining egg and ½ teaspoon vanilla. Spread half of the chocolate mixture in pan. Pour cheese mixture over; top with remaining chocolate mixture. Swirl layers to marble, if desired. Bake in a 350 ̊oven about 45 minutes. Cool on wire rack. Cut into bars. Makes 16.