INGREDIENTS
5
egg whites, room temperature
3/4 cup
buttermilk, divided
3/4 cup
unsalted butter, softened
1 3/4 cups
granulated sugar
2 1/2 cups
cake flour
1 tbsp
baking powder
1/2 tsp
kosher salt
1 1/2 tsp
cinnamon
1 tsp
nutmeg
1 tsp
ground ginger
1 cup
unsalted butter, softened
4 cups
powdered sugar
1 tsp
cinnamon
1/4 cup
milk
1/2 cup
cinnamon chips