01 -
In a large bowl, beat the softened butter with the brown and granulated sugars until light and fluffy.
02 -
Add the egg and vanilla extract to the butter mixture and mix until fully incorporated and smooth.
03 -
In a separate bowl, whisk together the flour, cocoa powder, baking soda, and salt.
04 -
Gradually add the dry ingredients to the wet mixture, stirring until a soft dough forms.
05 -
Gently incorporate the chocolate chips evenly throughout the dough.
06 -
Carefully fold in the marshmallow fluff a few times, maintaining visible ribbons without overmixing.
07 -
Scoop approximately 30 g (2 tablespoons) of dough per cookie onto a parchment-lined baking sheet and chill for 30 minutes to optimize texture and shape.
08 -
Preheat the oven to 175°C. Bake the cookies for 10 to 12 minutes until edges are set but centers remain slightly soft.
09 -
Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely or serve warm.