Blueberry Stuffed Crumb Cake - Blueberries

Ingredients

• 2 cups frozen blueberries
• 1/2 cup sugar
• 1 tablespoon cornstarch
• 3/4 cup butter, room temperature
• 1 1/3 cups sugar
• 3 large eggs
• 1 cup sour cream
• 1 teaspoon vanilla
• 2 1/4 cups flour
• 1/2 teaspoon baking powder
• 1/2 teaspoon salt
• 1/4 teaspoon baking soda
• 2 teaspoons lemon zest
• 13/4 cups flour
• 1/3 cup sugar
• 1/3 cup packed brown sugar
• 1 1/2 teaspoons ground cinnamon
• 3/4 cup butter, melted
• Confectioners’ sugar (optional)