Ingredients:
- 1 cup (225g) unsalted butter, softened
- 0.75 cup (150g) granulated white sugar
- 0.75 cup (150g) packed light brown sugar
- 1 large egg
- 1 large egg yolk
- 2 tsp vanilla extract
- 2 cups (250g) all-purpose flour
- 0.66 cup (60g) Dutch-processed cocoa powder
- 1 tsp cornstarch
- 1 tsp baking soda
- 0.5 tsp sea salt
- 1 cup (170g) semi-sweet chocolate chips
- 0.75 cup marshmallow fluff
- 0.5 cup mini marshmallows
Instructions:
- Preheat to 350°F (175°C) and line two large baking sheets with parchment paper.
- Beat 1 cup softened unsalted butter with 0.75 cup granulated white sugar and 0.75 cup packed light brown sugar until light, fluffy, and pale yellow.
- Incorporate 1 large egg, 1 large egg yolk, and 2 tsp vanilla extract.
- In a separate bowl, whisk 2 cups all purpose flour, 0.66 cup Dutch processed cocoa powder, 1 tsp cornstarch, 1 tsp baking soda, and 0.5 tsp sea salt.
- Slowly add the dry ingredients to the wet mixture, mixing on low speed until no white flour streaks remain.
- Add 1 cup semi sweet chocolate chips by hand.
- Drop 0.75 cup marshmallow fluff and 0.5 cup mini marshmallows onto the dough. Use a butter knife to swirl it through the dough only 3 or 4 times.
- Use a cookie scoop to place balls 2 inches apart. Make sure a marshmallow pocket is visible on top.
- Bake. Slide into the oven for 10 minutes until the edges are set but the center looks slightly soft.
- Cool. Let them rest on the pan for 5 minutes, then move to a wire rack to finish cooling.