3 contessa sour coffee cake Recipes

unsalted butter, at room temperature, granulated sugar, extra-large eggs, at room temperature, pure vanilla extract, sour cream, cake flour (not self-rising), baking powder, baking soda, kosher salt, light brown sugar , packed, all-purpose flour, ground cinnamon, kosher salt, cold unsalted butter , cut into pieces, chopped walnuts (optional), sugar, real maple syrup

unsalted butter, at room temperature, sugar, extra-large eggs, at room temperature, pure vanilla extract, sour cream, milk, all-purpose flour, whole wheat flour, baking powder, baking soda, kosher salt, fresh blueberries , picked through for stems