01 -
113g (1/2 cup) of room-temp unsalted butter.
02 -
100g (1/2 cup) white sugar.
03 -
100g (1/2 cup) brown sugar, packed.
04 -
1 large egg at room temperature.
05 -
1 teaspoon pure vanilla extract.
06 -
188g (1 1/2 cups) of all-purpose flour.
07 -
27g (1/3 cup) natural cocoa powder.
08 -
40g (1/4 cup) unsweetened hot chocolate mix.
09 -
1 teaspoon baking soda.
10 -
A pinch of salt (1/8 teaspoon).
11 -
2 teaspoons of milk.
12 -
10 to 11 large marshmallows, cut in half.
13 -
226g (8 ounces) semi-sweet chocolate, chopped.