Instructions: Preheat oven at 350. Prepare bottoms only of 12 muffin cups with cooking spray and flour. In a mixing bowl, combine chips, margarine, peanut butter, egg whites, and vanilla. In another mixing bowl, combine granulated sugar, flour, and baking powder. Mix wet ingredients with dry ingredients just until moistened. Divide batter evenly among muffin cups.

Bake 18 to 20 minutes or until tops are dry. Meanwhile, to prepare topping, combine powdered sugar, peanut butter, vanilla, and milk until smooth. Spread on cooled muffins.

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