Blueberry Breakfast Cake

1-1/2 cups flour
2 tsp. baking powder
1/4 tsp baking soda
pinch each salt and cinnamon
1 stick unsalted butter
1/2 cup sugar
1/2 cup brown sugar
2 large eggs
1/2 cup buttermilk
1 pint fresh blueberries


Preheat oven to 375. Butter a 7x11 baking pan. Whisk together flour, baking powder, baking soda, salt and cinnamon.

Using a mixer, beat the butter and sugars until smooth. Add eggs one by one and beat for 1 minute. On low speed, mix in half of the flour mixture, the buttermilk, then the rest of the flour mixture. Gently stir in berries. Pour into baking pan.

Bake for about 45 minutes. Cool for 5 minutes, unmold, then cool right-side up.