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heart shaped valentine m&m brownies on parchment paper

Valentine's M&M Brownies

  • Author: Sloane
  • Prep Time: 30 minutes
  • Cook Time: 35 minutes
  • Total Time: 1 hour 5 minutes
  • Yield: 8 large heart brownies 1x
  • Category: brownies
  • Method: baking
  • Cuisine: American


These heart shaped Valentine's M&M brownies are perfectly fudgy and studded with red, pink, and white M&Ms. They're the epitome of love at first bite!


  • 85g (½ cup; 3 oz) bittersweet chocolate
  • 170g (3/4 cup) unsalted butter
  • 200g (1 cup) granulated sugar
  • 142g (⅔ cup) brown sugar
  • 3 eggs, room temp
  • 2 tsp vanilla extract
  • 120g (1 cup) all-purpose flour
  • 63g (¾ cup) dutch process cocoa powder
  • 21g (¼ cup) black cocoa powder
  • ½ tsp salt
  • 170g (3/4 cup) Valentine's M&Ms, plus more for topping


  1. Preheat the oven to 350 degrees F and line a 9x9 inch pan with parchment paper.
  2. In a small bowl, add the bittersweet chocolate and butter. Place over a small saucepan of simmering water, and stir often until fully melted. Remove from the double boiler and allow to cool for a few minutes.
  3. Meanwhile, in a large bowl, add the sugars, eggs, and vanilla.
  4. Using an electric mixer, beat on high speed for about 5-6 minutes until the mixture has doubled in size. Scrape down the bowl to make sure everything is properly combined.
  5. While mixing on low speed, slowly pour in the chocolate butter mixture.
  6. Once it is fully combined, add the flour, cocoa powders, and salt, and fold until mostly combined.
  7. Lastly, fold in the M&Ms until evenly dispersed.
  8. Pour the brownie batter into the prepared pan and smooth out the top with an offset spatula. Top with more M&Ms, if desired.
  9. Bake the brownies for about 35 minutes.
  10. Allow them to cool completely in the pan before removing.
  11. Use a heart shaped cookie cutter to cut out as many hearts as you can. Alternatively, use a sharp knife to cut them into 16 squares. Enjoy!


  • Use a high-quality bittersweet chocolate. I recommend Valrhona or Guittard. 
  • Substitute for black cocoa powder. If you do not have black cocoa powder on hand, you can use a total of 84g (1 cup) dutch process cocoa powder instead. 
  • How to get a shiny top: Be sure to beat the sugars and eggs for a full 5-6 minutes! This is what will give the brownies that gorgeous shiny top. 
  • How to cut brownies: Use a heart cookie cutter to make heart shaped brownies. If cutting them into squares, use a sharp knife and run it under hot water (and wipe clean) before each cut.

Keywords: m&m brownies, valentine brownies, heart shaped brownies