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Preheat oven to 350°. Grease and flour a 9x13 pan. Combine flour, baking powder, baking soda, and
salt in a bowl. Set aside. In a separate bowl with an electric mixer cream the butter and sugar until
fluffy. Add eggs one at a time beating well after each addition. Add the flour mixture alternating with
the sour cream and VANILLA. Beat for an additional 2-3 minutes, until well blended. Combine the streusel
ingredients except for the blueberries and reserve 3/4 cup. Toss the rest of the streusel with the
blueberries. Spread 1/3 of the batter in the pan, top with 1/2 of the berry mixture, another third of the
batter, the rest of the berries, and finally the remaining batter. Sprinkle on the reserved 3/4 cup
streusel topping. Bake 50-55 minutes or until a toothpick comes out clean. Cool 10 minutes on a wire
rack. Carefully turn the pan over onto a serving plate or cake stand and remove from pan. When
completely cooled (2 hours or so) sprinkle with powdered sugar.
Prep time: 20 minutes
Baking Time: 50-55 minutes
Serves 10-12
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