Super-Moist Chocolate Cake with Fluffy Peanut Butter Frosting

INGREDIENTS

• CAKE:
• 1 box (18.25 oz.) chocolate cake mix
• 1 cup Hellmann's® or Best Foods® Real Mayonnaise
• 1 cup water
• 3 eggs
• 1 tsp. ground cinnamon
• FROSTING:
• 1 jar (225 mL) marshmallow creme
• 1/2 cup creamy peanut butter
• 1/3 cup margarine
• 1 1/3 cups confectioners sugar
• 2 Tbsp. milk
• 1/4 tsp. vanilla extract