Melt chocolate and 3 tablespoons butter over very low heat. Stir, then cool.

To make cheese layer, cream cream cheese with 2 tablespoons butter. Gradually add 1/4 cup sugar, creaming until fluffy. Blend 1 egg, 1 tablespoon flour and 1/2 teaspoon vanilla. Set aside.

To make chocolate layer, beat 2 eggs until light colored. Slowly add 3/4 cup sugar; beat until thickened. Add baking powder, salt and 1/2 cup unsifted flour. Blend in chocolate mixture, 1 teaspoon vanilla, almond extract and chopped nuts.

To bake, spread half the chocolate batter in greased 8- or 9-inch square pan. Top with cheese mixture. Spoon remaining chocolate batter over top. Zigzag through batter to marble. Bake at 350° for 35 to 40 minutes. Cool. Makes 16.