Ingredients: 1 1⁄4 cups butter or 1 1⁄4 cups margarine, softened 2 cups sugar 2 large eggs 2 teaspoons vanilla extract 2 cups all-purpose flour 3⁄4 cup cocoa 1 teaspoon baking soda 1⁄2 teaspoon salt 2 cups peanut butter chips (12 oz. pkg.) or 2 cups semi-s