These thick, fudgy Chocolate Shortbread Bars with Chocolate Buttercream Frosting are topped with M&M candy and are every chocolate lover's dream!
Print Recipe
5 from 1 vote

Chocolate Shortbread with Chocolate Buttercream Frosting

This thick, fudgy Chocolate Shortbread with Chocolate Buttercream Frosting is topped with M&M candy and is every chocolate lover’s dream!
Prep Time15 mins
Cook Time25 mins
Total Time40 mins
Course: Dessert
Cuisine: American
Servings: 12
Calories: 425kcal


  • 1 1/2 cups plus 2 tablespoons all-purpose flour
  • 1/2 cup cocoa powder
  • 1/2 cup white sugar
  • 1 cup butter melted
  • 1 recipe Chocolate Buttercream
  • 1/2 cup M&M candies


  • Preheat the oven to 325 degrees.
  • In a medium size bowl, mix together the flour, cocoa powder, sugar and melted butter. Press this mixture into the bottom of an 9" round (or 8x8 square) baking pan that has been sprayed with cooking spray. Bake at 325 degrees for 25 minutes.
  • Make the Chocolate Buttercream .
  • After the shortbread has cooled, spread the chocolate buttercream overtop the shortbread. Sprinkle the M&M's on top.


We like a thick layer of chocolate buttercream on top of our bars. If you'd like these bars to be less sweet, you can make a 1/2 recipe of buttercream for a thinner frosting layer.


Calories: 425kcal | Carbohydrates: 52g | Protein: 3g | Fat: 24g | Saturated Fat: 13g | Cholesterol: 41mg | Sodium: 211mg | Potassium: 149mg | Fiber: 2g | Sugar: 35g | Vitamin A: 490IU | Calcium: 25mg | Iron: 1.9mg