INGREDIENTS
8 tbsp
unsalted butter (melted)
1/3 cup
sugar
1/3 cup
packed dark brown sugar
3/4 tsp
ground cinnamon
1/8 tsp
salt
1 3/4 cups
cake flour
1 1/4 cups
cake flour
1/2 cup
granulated sugar
1/4 tsp
baking soda
1/4 tsp
salt
6 tbsp
unsalted butter (cut into 6 pieces and softened)
1/3 cup
buttermilk
1
large egg plus 1 large yolk
1 tsp
vanilla extract
confectioner's sugar for dusting