Streusel Ingredients 1/4 cup sugar 1/3 cup brown sugar, lightly packed 1 teaspoon cinnamon 1/8 teaspoon nutmeg 1/4 pound (1 stickk) butter, melted 1 1/3 cups flour Cake Ingredients 6 tablespoons butter, at room temperature 3/4 cup sugar 2 eggs 1 teaspoon vanilla extract 1/2 teaspoon grated lemon zest 2/3 cup sour cream 1 1/4…
