Makes 2 cakes 3 sticks unsalted butter, at room temperature 4 cups cake flour, plus 1 tablespoon for blueberries 1 teaspoon salt 3 teaspoons baking powder 2 cups sugar 6 large eggs 1 tablespoon vanilla extract 1 1/2 cups buttermilk 1 1/2 cups blueberries Zest of lemon Preheat the oven to 350 degrees. Butter and flour 2 (9 x 5 inch) loaf pans and set aside. Sift the flour with the salt and baking powder into a medium bowl and set aside. In a large bowl, use a mixer to cream the butter and sugar until pale in color, about 5 minutes on medium speed. Add the eggs one at a time, beating well after each addition. Then add the vanilla and beat until combined. Slowly add the flour mixture and buttermilk to the butter mixture, beating until only just combined. Toss the blueberries in flour and fold in with lemon zest. Pour batter into the prepared pans, making sure to divide the batter evenly between the two pans. Level tops with an offset spatula or smack on the counter a couple times. Bake for about 1 hour, until a toothpick comes out clean. Let the cake cool in the…