Lemon Blueberry Marble Cake
Friday, May 9, 2014 4:00 PM
Cake ingredients: 2 sticks (8 ounces) unsalted butter, at room temperature 2 cups sugar 2 tsp grated lemon zest 1½ tsp lemon extract 7 egg whites 3 cups cake flour 4 tsp baking powder ½ tsp salt 1¼…