Good-Cooking - Sour Cream Blueberry Cake

Ingredients

• 1/2 cup soft butter
• 1 cup granulated sugar
• 3 eggs
• 2 cups sifted flour
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1 cup sour cream
• 1 teaspoon vanilla extract
• 2 cups blueberries, divided
• 1/2 cup brown sugar, firmly packed