01 -
Combine the cocoa, flour, salt, and soda in a bowl.
02 -
Whip your sugar and butter for a few minutes till it's light and airy.
03 -
Add the eggs individually, mixing each one in before adding the vanilla.
04 -
Stir the dry things into the wet ones until they’re just mixed.
05 -
Stash the dough in the fridge for at least an hour.
06 -
Shape dough into balls, press down the center, spoon in marshmallow fluff, and swirl it around.
07 -
Bake for 10 to 12 minutes at 350°F.