INGREDIENTS
4 cups
plus 2 Tablespoons ((480 g) cake flour)
2 tsp
baking powder
1 1/2 tsp
baking soda
1 tsp
salt
1 cup
unsalted butter, softened
2 cups
granulated sugar
2 tsp
pure vanilla extract
4
large eggs (, at room temperature)
2 cups
buttermilk (, well-shaken)
1/2 cup
butter, cut in pieces
1/4 cup
brown sugar
1/2 cup
old-fashioned oats
5
fresh peaches (, peeled and sliced)