Blueberry Sour Cream Coffee Cake
ingredients FOR THE STREUSEL TOPPING 6 tablespoons packed light brown sugar 1/2 cup all-purpose flour, spooned into measuring cup and leveled-off 1 teaspoon ground cinnamon 1/4 teaspoon salt 4 tablespoons unsalted butter, cold, cut into 1/2-inch chunks FOR THE CAKE 2 cups all-purpose flour, spooned into measuring cup and leveled-off 2 teaspoons baking powder 1/2 ...