A tender, moist blueberry buckle coffee cake with a clumpy cinnamon streusel topping that offers a perfect balance of soft cake and crisp texture, ideal for cozy breakfasts or brunch.
Use room temperature eggs and butter for a smooth batter. Do not overmix after adding flour to avoid toughness. Handle blueberries gently to keep them whole. Keep butter cold for streusel to maintain clumpy texture. Start checking doneness at 40 minutes. Use a light-colored pan or reduce oven temperature by 25°F if using dark pans. For frozen blueberries, thaw, drain, and toss with a tablespoon of flour before folding in.
Keywords: blueberry buckle, coffee cake, cinnamon streusel, moist cake, breakfast cake, easy coffee cake, blueberry cake, streusel topping