2 c. sugar
1 c. butter
2 tsp. vanilla
4 eggs
1 1/2 c. all-purpose flour
3/4 c. cocoa
1 tsp. baking powder
1/2 tsp. salt
1 c. peanut butter chips
3/4 c. peanut butter
1/3 c. butter, softened
1/3 c. sugar
2 tbsp. flour
2 eggs
3/4 tsp. vanilla

Heat oven to 350 degrees. Grease 13 x 9 inch pan. Cream 2 cups sugar and 1 cup butter until light and fluffy. Add 2 teaspoons vanilla and eggs, one at a time, beating well after each. Lightly spoon flour into measuring cup; level off. Gradually add 1 1/2 cups flour, 3/4 cup cocoa, 1 teaspoon baking powder, and 1/2 teaspoon salt to bowl.

In a second bowl, cream peanut butter chips, 3/4 cup peanut butter, and 1/3 cup butter. Add 1/3 cup sugar, 2 tablespoons flour, 2 eggs, and 3/4 teaspoon vanilla. Beat until smooth.

Spread half of chocolate mixture in prepared pan. Spread peanut butter mixture over chocolate mixture. Spread remaining chocolate mixture over peanut butter mixture. Gently cut through layers to marble.

Bake at 350 degrees for 40 to 50 minutes or until top springs back when lightly touched in center and brownies begin to pull away from sides of pan.

Cool completely. In medium saucepan, melt 3 ounces of unsweetened chocolate squares and 3 tablespoons butter over low heat, stirring constantly. Remove from heat. Stir in 2 2/3 cups powdered sugar, 1/4 teaspoon salt, 3/4 teaspoon vanilla, and 4 to 5 tablespoons of water until frosting is smooth; spread over brownies. Cut into bars. Yield: About 54 bars.

This takes time but is very delicious and not fattening at all! Nice for a party of big event.