Ingredients:

  • 0.5 cup unsalted butter, melted and slightly cooled
  • 0.75 cup packed light brown sugar
  • 1 large egg, room temperature
  • 1 tsp pure vanilla extract
  • 1.25 cups all-purpose flour
  • 1 cup graham cracker crumbs
  • 0.5 tsp baking powder
  • 0.25 tsp fine sea salt
  • 1.5 cups semi-sweet chocolate chips
  • 1 cup marshmallow fluff
  • 1.5 cups mini marshmallows
  • 2 milk chocolate bars, broken into rectangles

Instructions:

  1. Preheat your oven to 180°C (350°F). Line your 8x8 pan with parchment paper, leaving an overhang on the sides.
  2. Whisk together 1.25 cups flour, 1 cup graham crumbs, 0.5 tsp baking powder, and 0.25 tsp salt.
  3. In your mixer, beat the cooled 0.5 cup melted butter with 0.75 cup brown sugar until it looks grainy but combined.
  4. Add the egg and 1 tsp vanilla. Beat on medium speed for 2 minutes until the mixture lightens in color.
  5. Fold in the dry ingredients using a spatula. The dough will be thick and heavy.
  6. Press about two thirds of the dough into the bottom of the pan. Bake for 8 minutes until the edges are just barely set.
  7. Remove from oven and immediately spread 1 cup of marshmallow fluff over the warm base.
  8. Sprinkle 1.5 cups chocolate chips and 1.5 cups mini marshmallows over the fluff. Press the 2 broken chocolate bars into the gaps.
  9. Flatten small pieces of the remaining dough with your hands and scatter them over the top.
  10. Bake for another 15 to 18 minutes until the marshmallows are browned and bubbling.