INGREDIENTS
1/2 cup
unsalted butter, softened
1/2 cup
granulated sugar
1
large egg
2 1/2 tsp
vanilla extract, divided
1/2 tsp
butter extract
1/2 tsp
baking soda
1/2 tsp
cream of tartar
1/2 tsp
salt
2 cups
flour
1/3 cup
sprinkles, plus more for the top
1 1/2 cups
milk or semi-sweet chocolate chips
1/2 can
fat-free sweetened condensed milk, about 5 ounces (just over 1/2 cup)