Ingredients:
- ½ cup unsalted butter, room temperature
- Zest from a large lemon
- 1 cup sugar
- 1 large egg, room temperature
- 1 teaspoon vanilla
- 2 cups cake flour or all-purpose flour, plus 2 tablespoons flour
- 2 teaspoons baking powder
- 1 teaspoon Saigon cinnamon or 2 teaspoons ground cinnamon
- 1/2 teaspoon salt
- 2 cups fresh blueberries, rinsed and patted dry on a paper towel
- 1/2 cup buttermilk
- 1 cup crushed almonds or walnuts
- 3/4 teaspoon Saigon cinnamon or 1-1/2 teaspoons ground cinnamon
- 3 tablespoons brown sugar
- Preheat oven to 350 degrees.
- Make topping and set aside.
- Cream butter with lemon zest and sugar until light and fluffy.
- Add the egg and vanilla, and beat until combined.
- Toss the blueberries with 2 tablespoons flour and set aside.
- Whisk together the cake flour or regular flour, baking powder, cinnamon, and salt.
- Add the flour mixture to the egg and vanilla a little at a time, alternating with the buttermilk. Mix on low speed until incorporated then fold in the floured blueberries last.
- Grease a 9-inch square baking dish with butter or coat it with non-stick spray. Spread batter into pan.
- Sprinkle the topping evenly over the batter.
- Bake breakfast cake for 28 minutes. Use a toothpick to check for doneness. Let cool for at least 10 minutes before cutting.