Blueberry Coffee Cake...

I cannot wait to try this recipe from www.alexandracooks.com
Buttermilk-Blueberry Breakfast Cake
Serves 6-8
½ cup unsalted butter, room temperature
2 tsp. lemon zest or more — zest from 1 large lemon
7/8 cup + 1 T. sugar
1 egg, room temperature
1 tsp. vanilla
2 cups flour
2 tsp. baking powder
1 tsp. kosher salt
2 cups fresh blueberries
½ cup buttermilk
1. Preheat the oven to 350ºF. Cream butter with lemon zest and 7/8 cup of the sugar until light and fluffy.
2. Add the egg and vanilla and beat until combined. Meanwhile, toss the blueberries with ¼ cup of flour, then whisk together the remaining flour, baking powder and salt.
3. Add the flour mixture to the batter a little at a time, alternating with the buttermilk. Fold in the blueberries.
4. Grease a 9-inch square baking pan (or something similar) with butter or coat with non-stick spray. Spread batter into pan. Sprinkle batter with remaining tablespoon of sugar. Bake for 35 minutes. (Note: Some of you have found this cake needs much more time in the oven, so don’t be afraid to cook it for 10 minutes longer, if need be. Just check with a toothpick every 5 minutes or so.) Check with a toothpick for doneness. If necessary, return pan to oven for a couple of more minutes. Let cool at least 10 minutes before serving.