01 -
Whisk together flour, cocoa powder, baking soda and salt.
02 -
Beat butter and sugar 3-4 minutes until fluffy. Add eggs one at a time, then vanilla.
03 -
Gradually mix dry ingredients into wet ingredients until just combined.
04 -
Refrigerate dough at least 1 hour.
05 -
Form dough balls, make indent, fill with marshmallow fluff and swirl.
06 -
Bake at 350°F for 10-12 minutes until edges set but centers soft.