Double-Good Fudge
["vegetable cooking spray", "1 (16 oz.) pkg. powdered sugar, sifted", "1 c. chunky peanut butter", "1/4 c. plus 2 Tbsp. milk", "1/2 tsp. vanilla extract", "1/2 c. butter or margarine", "1 (16 oz.) pkg. powdered sugar, sifted", "1/4 c. milk", "1/2 c. cocoa", "1 tsp. vanilla extract"]
["Coat eight (4 ounce) shallow baking dishes with vegetable cooking spray; set aside.", "Combine 1 package powdered sugar, chunky peanut butter and 1/4 cup plus 2 tablespoons milk in a large microwave-safe bowl, stirring well.", "Add 1/2 teaspoon vanilla; stir until smooth.", "Cover with wax paper and microwave at High 2 to 3 minutes.", "Spread evenly into prepared dishes.", "Place 1/2 cup butter in a separate microwave-safe bowl.", "Microwave at High 1 minute or until melted.", "Stir in 1 package powdered sugar, 1/4 cup milk and 1/2 cup cocoa.", "Cover with wax paper and microwave at Medium-high (70%) power for 2 to 3 minutes.", "Add 1 teaspoon vanilla; stir until smooth.", "Spread chocolate mixture evenly over peanut butter layers; cool."]
["vegetable cooking spray", "powdered sugar", "chunky peanut butter", "milk", "vanilla extract", "butter", "powdered sugar", "milk", "cocoa", "vanilla extract"]