INGREDIENTS
1/2 cup
unsalted butter (softened)
2/3 cup
granulated sugar
1/4 cup
light brown sugar
1
egg
1
egg yolk
1 tsp
pure vanilla extract
2 tbsp
sour cream
1 1/2 cups
all purpose flour
1 tsp
cream of tartar
1/2 tsp
baking soda
1/2 tsp
salt
1 1/2 tsp
ground cinnamon
1/2 cup
unsalted butter (softened)
3 cups
powdered sugar (sifted)
2 tbsp
half and half or cream
1/2 tsp
pure vanilla extract
1 1/2 tsp
ground cinnamon
2 tsp
cinnamon sugar (for topping)