Ingredients:
- 1/2 cup (115g) unsalted butter, room temperature
- 1 cup (250g) creamy peanut butter, classic style
- 3/4 cup (150g) packed brown sugar
- 1/2 cup (100g) granulated sugar
- 1 large egg (approx. 50g)
- 1 tsp (5ml) vanilla extract
- 2 1/4 cups (280g) all-purpose flour
- 1 tsp (5g) baking soda
- 1/2 tsp (3g) kosher salt
- 1 cup (130g) marshmallow fluff, slightly chilled
Instructions:
- Cream the butter, peanut butter, brown sugar, and granulated sugar on medium-high speed for 3 minutes until pale and aerated.
- Add the egg and vanilla extract, beating until the mixture is velvety and fully emulsified with no streaks remaining.
- Whisk together flour, baking soda, and salt. Add to the wet ingredients on the lowest mixer setting, mixing only until white streaks disappear.
- Scoop 1 tablespoon rounds of chilled marshmallow fluff onto a tray. Keep these in the fridge until the very second you need them.
- Take 2 tablespoons of dough, flatten it in your palm, place the fluff in the center, and wrap the dough around it. Ensure no fluff is visible.
- Chill the balls. Place the stuffed dough balls in the fridge for 20 minutes. This prevents the cookies from spreading too fast in the oven.
- Bake at 350°F (180°C) for 12 minutes until the edges are golden and crackling.
- Let the cookies sit on the hot pan for at least 10 minutes. The marshmallow core needs this time to set or it will run everywhere when you bite in.
- Transfer to a wire rack to ensure the bottoms stay crisp.