Blueberry Buckle - cooking recipe

Ingredients

1/2 c. (1 stick) unsalted butter (plus more for pan)
2 c. flour (plus more for pan)
1 1/2 tsp. baking powder
1/2 tsp. salt
3/4 c. sugar
1 egg
1 tsp. vanilla
1/2 c. milk
5 c. blueberries
1 recipe Streusel Topping (recipe follows)

Preparation

Preheat oven to 350\u00b0.
Butter and flour spring-form baking pan; set aside.
Sift together flour, baking powder and salt; set aside.
With electric mixer on medium, cream butter and sugar until light and fluffy, about 3 minutes.
Reduce speed to low and add egg and vanilla.
Alternately add flour mixture and milk, beginning and ending with flour mixture.
Fold in berries.