MARBLED CHOCOLATE BROWNIES

1 BAR OF (4 OUNCES) BITTERSWEET BAKING CHOCOLATE -1/2 CUP(1 STICK) BUTTER 2 TABLESPOONS OF COCOA POWDER -11/4 CUP SUGAR-1/4 TEASPOON SALT-3 EGGS-1 TEASPOON VANILLA EXTRACT-1CUP ALL-PURPOSE FLOUR-1/2 TEASPOON BAKING POWDER - TOPPING - 1 CUP SEMISWEET CHOCOLATE BAKING CHIPS - 1CUP WHITE CHOCOLATE BAKING CHIPS OVEN- TEMP 350F -9 IN PAN PUT TIN FOIL AND MAKE SURE IT HANGS OVER EDGE-PUT BITTERSWEET CHOVOLATE AND BUTTER IN MICROWAVE AND MELT THEN STIR TO BLEND=PLACE SUGAR AND SALT IN MEDIUM BOWL ADD THE 3 EGGS ONE AT A TIME AND STIR-STIR IN VANILLA-SIFT IN FLOUR AND BAKING POWDER-SPREAD BATTER IN PREPARED PAN BAKE 30 MINUTES-SPRINKLE CHOCOLATE CHIPS OVER BROWNIES AND RETURN TO OVER FOR 1 MINUTE -REMOVE AND LET SET FOR 1 MINUTE USING FOIL LIFT BROWNIES FROM PAN AND SPREAD CHOCOLATE CHIPS OVER BROWNIES FOR A MARBLE EFFECT ENJOY