01 -
1/2 cup unsalted butter, softened (113g).
02 -
1/2 cup granulated sugar (100g).
03 -
1/2 cup brown sugar (100g).
04 -
1 large egg, room temperature.
05 -
1 teaspoon vanilla extract.
06 -
1 1/2 cups all-purpose flour (188g).
07 -
1/3 cup natural cocoa powder (27g).
08 -
1/4 cup dry hot cocoa mix (40g).
09 -
1 teaspoon baking soda.
10 -
1/8 teaspoon salt.
11 -
2 teaspoons milk.
12 -
10-11 large marshmallows, halved.
13 -
8 ounces semi-sweet chocolate, chopped (226g).