01 -
Cut the butter into cubes. In a heavy saucepan, heat the butter over medium heat. Stir constantly until the butter begins to turn golden brown. It will get foamy, which is normal. Once it reaches a beautiful golden brown color, remove from heat and transfer to a heat-safe bowl to cool.
02 -
While the butter cools, preheat oven to 350°F (175°C). Sift together the dry ingredients: flour, baking soda, and salt.
03 -
In a large bowl, combine the cooled brown butter, brown sugar, granulated sugar, room temperature egg, and vanilla extract. Whisk until thoroughly combined.
04 -
Add the sifted dry ingredients to the wet mixture and fold gently until just combined. Be careful not to overmix.
05 -
Fold in the mini M&M's, chocolate chips, and 1/4 cup of Rice Krispies cereal until evenly distributed throughout the dough. Again, avoid overmixing.
06 -
Scoop the dough using a 1/3 cup measure or standard ice cream scoop to form 6 equal cookie dough balls. Flatten each ball with the palm of your hand.
07 -
Place a marshmallow in the center of each flattened cookie dough. Enclose the marshmallow with the cookie dough, leaving just the top of the marshmallow exposed.
08 -
Place the reserved 1/3 cup of Rice Krispies cereal in a small bowl. Dip the top of each cookie (the part with the exposed marshmallow) into the cereal to coat.
09 -
Place the cookies on a large baking sheet, leaving ample space between them as they will spread. Add a few more chocolate chips on top if desired.
10 -
Bake for 10 minutes, or until the cookies are golden brown on the bottom but still look slightly underdone on top. The marshmallow will be puffy and lightly golden.
11 -
If needed, use a large round cookie cutter or measuring cup to carefully reshape the cookies while still warm. If desired, flip the marshmallow and spread the gooey center around the middle of the cookie. Sprinkle additional M&M's and Rice Krispies cereal on top while the cookies are still warm.
12 -
Allow the cookies to cool completely on the baking sheet before serving.