01 -
1/2 cup (113g) butter, unsalted and softened.
02 -
1/2 cup (100g) packed dark or light brown sugar.
03 -
1/2 cup (100g) white sugar.
04 -
1 large egg, at room temp.
05 -
2/3 cup (156g) smooth peanut butter.
06 -
1 tsp vanilla extract.
07 -
1 1/4 cups (156g) plain flour.
08 -
1/2 tsp baking soda.
09 -
1/2 tsp salt.
10 -
8 oz (226g) semi-sweet chocolate, chopped.
11 -
1 tsp vegetable oil or coconut oil.
12 -
8 oz (226g) mascarpone cheese, softened.
13 -
1/2 cup (120g) roughly chopped peanuts or toffee bits for garnish (optional).