Peach Crumb Cake

Ingredients:

1 c. all-purpose flour

¼ c. cake flour

½ c. sugar

8 tbsp. (1 stick) butter, room temperature

1 egg + 1 egg yolk

¼ c. sour cream

¼ c. buttermilk

1½ tsp. baking powder

¼ tsp. salt

½ tsp. cinnamon

2 tsp. vanilla

1 extra large ripe peach (or 2 small), skin removed, thinly sliced

Crumb topping:

⅓ c. + 1 tbsp. all-purpose flour

½ c. brown sugar

4 tbsp. butter