The slight crunch of cornmeal paired with juicy blueberries makes this coffee cake an irresistible breakfast classic. The cinnamon crumb topping takes it to the next level.
Preheat oven to 350°F. Grease a 9x9-inch baking pan.
For the crumb topping, mix flour, brown sugar, and cinnamon; cut in cold butter with fingers until crumbly. Refrigerate.
In a large bowl, beat butter and sugar until light and fluffy. Add eggs one at a time; stir in vanilla.
In a separate bowl, whisk flour, cornmeal, baking powder, and salt. Alternate adding to batter with milk.
Toss blueberries lightly in flour and fold gently into batter.
Pour batter into pan and sprinkle crumb topping evenly over the top.
Bake 35-40 minutes until a toothpick inserted in center comes out clean. Cool before serving.