Blueberry Sour Cream Coffee Cake

 

Ingredients:

 

 

2 cups all-purpose flour

 

1/2 cup granulated sugar

 

2 teaspoons baking powder

 

1/2 teaspoon baking soda

 

1/4 teaspoon salt

 

1/2 cup unsalted butter, at room temperature

 

1/2 cup sour cream

 

2 eggs

 

1 teaspoon vanilla extract

 

1 cup fresh blueberries

 

Topping:

 

1/2 cup all-purpose flour

 

1/2 cup granulated sugar

 

1/2 teaspoon ground cinnamon

 

1/4 cup unsalted butter, at room temperature