Best Blueberry Coffee Cake Recipe - How To Make Blueberry Coffee Cake

Ingredients

• 3/4 c. packed brown sugar
• 1/4 c. granulated sugar 
• 2 tsp. ground cinnamon
• 1/4 tsp. kosher salt
• 3/4 c. (1 1/2 sticks) butter, melted
• 1 1/2 c. all-purpose flour
• 3/4 c. (1 1/2 sticks) butter, softened, plus more for greasing
• 2 1/2 c. plus 2 tbsp all-purpose flour, divided
• 1 tsp. baking soda
• 3/4 tsp. baking powder
• 1/2 tsp. kosher salt
• 1 1/2 c. granulated sugar
• 2 large eggs
• 1 1/3 c. sour cream
• 2 tsp. pure vanilla extract
• 2 c. blueberries