Preheat oven to 350℉. Gather your ingredients so that you have everything close at hand on the counter or table. Prepare a 9" cake pan or coffee cake pan with baking spray.
Prepare the Ingredients
Using a knife or nut chopper, chop pecans.
Wash and drain fresh blueberries in a colander. Sprinkle with all-purpose flour and stir to coat. Set aside until ready to use.
Make the Crumb Topping
To make the crumb topping, in a small bowl combine granulated sugar, brown sugar, old-fashioned oats, chopped pecans, all-purpose flour, salt, and ground cinnamon.
With a blending fork, cut in butter until crumbly. Set aside.
Prepare the Cake Batter
In a small bowl, combine the all-purpose flour, baking powder, baking soda, salt, ground cinnamon and nutmeg.
In a large mixing bowl, beat together the granulated sugar and softened butter until creamy, approximately 5-7 minutes.
Add large eggs one at a time, along with vanilla extract.
Alternately add floured mixture to creamed sugar with buttermilk.
Using a rubber spatula, fold prepared blueberries into the batter.
Spread batter into the prepared baking pan. Smooth the top to make it even. Sprinkle the top with crumb topping.
Bake in preheated oven for 50-60 minutes until wooden toothpick inserted in center of cake comes out clean. Cool for 10 minutes. If using a Bundt-style pan, remove from pan at this time and place on a pretty cake or serving plate.
Make the Glaze
In a small bowl combine powdered sugar, hot water, and vanilla extract. Whisk until smooth and creamy.
Drizzle over slightly warm cake. Serves 12.
Notes
*Unless otherwise noted, all recipes on this site use salted butter.