01 -
113g (1/2 cup) of softened butter, unsalted.
02 -
100g (1/2 cup) white sugar.
03 -
100g (1/2 cup) packed brown sugar.
04 -
1 room-temperature large egg.
05 -
1 teaspoon pure vanilla extract.
06 -
188g (1 1/2 cups) plain flour.
07 -
27g (1/3 cup) cocoa powder (unsweetened).
08 -
40g (1/4 cup) dry hot chocolate mix.
09 -
1 teaspoon soda for baking.
10 -
1/8 teaspoon table salt.
11 -
2 teaspoons milk.
12 -
10 or 11 big marshmallows sliced in half.
13 -
226g (8 oz) semi-sweet chocolate, roughly chopped.