01 -
Stir together the salt, cocoa, baking soda, and flour.
02 -
Mix sugar and butter on high until soft and fluffy—takes about 3 minutes.
03 -
Drop in the eggs one by one, mixing after each, then toss in the vanilla.
04 -
Stir the dry stuff into the wet until barely mixed.
05 -
Pop the dough in the fridge for a minimum of an hour.
06 -
Form balls, press them, add fluff, and swirl it around.
07 -
Bake in a 350°F oven for 10 to 12 minutes.