INGREDIENTS
1 cup
semisweet chocolate chips
1 1/2 sticks
unsalted butter, cut into pieces
1/2 cup
peanut butter
4 oz
unsweetened chocolate, chopped
1 1/2 cups
granulated sugar
3
large eggs plus 1 egg yolk
1 tsp
vanilla extract
3/4 cup
all-purpose flour
1/4 tsp
fine sea salt
9
full-size peanut butter cups