Your Next Coffee Break Needs Blueberry Sour Cream Coffee Cake

Name: Your Next Coffee Break Needs Blueberry Sour Cream Coffee Cake
Cuisine: American, Southern
Ingredients: 1/2 cup all-purpose flour; 3 tablespoons brown sugar; 3 tablespoons sugar; 1 1/2 teaspoons cinnamon; 4 tablespoons unsalted butter (cut into small bits); 1 cup blueberries (fresh or frozen); 2 teaspoons sugar; 2 teaspoons flour; 1/4 teaspoon cinnamon; 1 3/4 cups all-purpose flour; 3/4 cup sugar; 1 teaspoon baking powder; 1/4 teaspoon baking soda; 1/4 teaspoon salt (fine kosher or sea); 1 cup sour cream (preferably full-fat); 1/2 cup canola oil (or other neutral-flavored oil); 2 large eggs (lightly beaten); 2 teaspoons vanilla extract