INGREDIENTS
1
Egg
2 cups
All-purpose flour
1 tsp
Baking soda
1/2 cup
Brown sugar, firmly packed light
1/2 tsp
Cream of tartar
1 cup
Granulated sugar
3/4 tsp
Salt
1 cup
Sprinkles, mixed green and red
2 1/2 tsp
Vanilla extract
10 tbsp
(5 oz./155 g) unsalted butter, unsalted