Apple Crumble Cakes with Chestnuts
Ingredients 2/3 cup light brown sugar 1 cup buttermilk 1 cup roasted chestnuts, quartered 1 and 1/2 cups coarsely chopped walnuts 1 teaspoon baking powder 2 large Granny Smith apples peeled cut into 1/2-inch dice 1 cup turbinado sugar 1 teaspoon cinnamon 2 cups all-purpose flour 1 teaspoon baking soda 1 stick unsalted butter, softened…