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A stack of three brownie cookie sandwiches with a peppermint buttercream filling
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5 from 1 vote

Brownie Cookie Sandwiches with Peppermint Filling

Delicious peppermint icing filled brownie cookie sandwiches. Crackly, brownie cookies surround a creamy peppermint buttercream frosting.
Prep Time30 mins
Cook Time15 mins
Total Time45 mins
Course: Cookies, Dessert
Cuisine: American, American Dessert
Keyword: brownie cookie sandwiches, brownie cookie sandwiches with peppermint filling recipe
Servings: 10 cookie sandwiches
Calories: 690kcal
Author: Rachael Yerkes


Brownie Cookies

  • 1 stick / 1/2 cup unsalted butter cut into chunks
  • 10 oz dark chocolate chips
  • 1 cup + 2 tbsp white sugar
  • 3 eggs
  • 2 tbsp cocoa powder
  • 1 tsp vanilla extract
  • 1/2 tsp salt
  • 1/2 tsp baking powder
  • 3/4 cup plain flour
  • 1/2 cup dark chocolate chips

Peppermint Icing Filling

  • 4 cups powdered sugar confectioners sugar
  • 1 cup softened butter salted
  • 2 tsps vanilla
  • 1/2 tsp peppermint extract
  • 1-2 Tablespoons milk
  • Optional Crushed Peppermints


Brownie Cookies

  • Preheat oven to 350F.
  • Line two baking trays with parchment / baking paper.
  • Pour 1" of water into a large saucepan or small pot and bring to a simmer over medium low heat.
  • Place a bowl over the simmer water and melt the butter and chocolate chips.
  • Stir until smooth.
  • While the chocolate is melting, place the eggs, cocoa powder and sugar in a bowl and beat for 3 minutes on high (using an electric beater or stand mixer with the whisk attachment).
  • Pour 1/3 of the melted chocolate into the egg mixture and mix well, then pour the remaining melted chocolate in and mix again.
  • Add the vanilla, salt and baking powder and mix until combined.
  • Add the flour and mix until just combined - do not over mix.
  • Fold in 1/2 cup dark chocolate chips.
  • Drop 1 1/2 tbsp of mixture onto the baking tray, leaving 2" between each cookie.
  • Bake cookies for 15 -16 minutes
  • Allow to rest on the baking tray for 5 to 10 minutes before carefully transferring to a cooling rack.

Peppermint Icing Filling

  • In a large bowl, using a hand mixer, cream all ingredients together*, except crushed peppermints.
  • *Start with only 1 T of milk, and add more to reach desired thickness.
  • Fold in crushed peppermints just before using.


  • Turn a brownie cookie over, and pipe or spread peppermint buttercream icing over it, then place a second cookie on top to form a sandwich


Calories: 690kcal | Carbohydrates: 97g | Protein: 6g | Fat: 31g | Saturated Fat: 23g | Cholesterol: 98mg | Sodium: 340mg | Potassium: 311mg | Fiber: 2g | Sugar: 80g | Vitamin A: 640IU | Vitamin C: 0.2mg | Calcium: 141mg | Iron: 1.4mg