INGREDIENTS
1 stick
unsalted butter, room temperature
2/3 cup
granulated sugar
1 tsp
vanilla
1
large egg
1 1/4 cups
all-purpose flour
1/2 tsp
fine salt
4 oz
semisweet chocolate chips
Mint Layer (optional):
3/4 cup
confectioners' sugar
1/4 tsp
pure peppermint extract