Blueberry Streusel Coffee Cake Recipe - Details, Calories, Nutrition Information

Ingredients

• 1 tbsp melted butter , or as needed
• 1 tbsp all-purpose flour , or as needed
• 2 3/4 cups all-purpose flour
• 1 1/2 tsp baking powder
• 1 1/2 tsp baking soda
• 1 tsp salt
• 3/4 cup unsalted butter
• 1 cup white sugar
• 3 room-temperature eggs
• 2 tsp vanilla extract
• 1 pint sour cream
• 2 cups blueberries
• 3/4 cup brown sugar
• 3/4 cup chopped walnuts
• 1 tsp ground cinnamon