01 -
1/2 cup (113g) softened unsalted butter.
02 -
1/2 cup (100g) packed light or dark brown sugar.
03 -
1/2 cup (100g) white sugar.
04 -
1 room-temperature large egg.
05 -
2/3 cup (156g) creamy peanut butter.
06 -
1 teaspoon vanilla extract.
07 -
1 1/4 cups (156g) all-purpose flour.
08 -
1/2 teaspoon baking soda.
09 -
1/2 teaspoon salt.
10 -
8 ounces (226g) semi-sweet chocolate, chopped into pieces.
11 -
1 teaspoon vegetable or coconut oil.
12 -
8 ounces (226g) mascarpone cheese, softened.
13 -
1/2 cup (120g) crushed toffee bits or chopped peanuts (optional).