1 BOX CHOCOLATE CAKE MIX, 3 EGGS, , 1 STICK BUTTER, SOFT, 1 TSP. VANILLA, 1 BOX 4x SUGAR, 1-8-OZ. CREAMCHEESE, SOFT. COMBINE FIRST THREE INGREDIENTS WITH 1/2 TSP. VANILLA IN A BOWL; MIX WELL, PRESS INTO A GREASED 9X13-INCH PAN. MIX REMAINING INGREDIENTS AND OTHER 1/2 TSP. OF VANILLA IN A BOWL. SPREAD OVER CAKE MIX LAYER. BAKE @ 350 FOR 30 MINS.