INGREDIENTS
1/2 cup
unsalted butter, room temperature
1 cup
sugar
1
egg
1 tsp
vanilla extract
1 1/2 cups
flour
1/3 cup
unsweetened cocoa powder
1/2 tsp
baking powder
1/2 tsp
baking soda
1/2 tsp
kosher salt
1 cup
dark chocolate chips
1 cup
Heath toffee bits
coarse sea salt (for topping (optional))