INGREDIENTS
2 1/2 cups
all-purpose flour
2 1/2 cups
white whole wheat flour*
1/2 cup
sugar
1 tbsp
plus 1 tsp. baking powder
2 tsp
ground cinnamon
1 tsp
salt
grated nutmeg
8 tbsp
cold unsalted butter, cut into small pieces
1 1/2 cups
mashed ripe banana (about 3-4 large bananas)
1 cup
low-fat greek yogurt or sour cream
Buttermilk, if needed, plus more for brushing
8 tbsp
butter
1 cup
confectioners’ sugar
3 tbsp
milk, plus more as needed