This takes a bit of time to bake/cool/glaze, but its quite tasty.

Preheat oven to 350F.

Lightly grease and flour a 10-inch tube pan.

Sift 3 cups flour with baking powder, baking soda, and salt. Set aside.

In small bowl, combine brown sugar with 1 tablespoon flour and the cinnamon; mix well.

In large bowl of electric mixer, at medium speed, beat butter with granulated sugar and vanilla until fluffy. Add eggs, one at a time, beating after each addition.

At low speed, beat in flour mixture(in three additions) alternately with sour cream (in two additions), beating until combined.

Turn one third of batter into prepared pan, spreading evenly. Sprinkle with half the blueberries and half the brown-sugar mixture. Repeat layering of remaining batter, blueberries, and brown-sugar mixture. Bake 60 minutes, or until cake tester inserted in center comes out clean.

Cool in pan on wire rack 20 minutes.

Gently remove from pan. Mix confectioners sugar and milk until smooth. Drizzle over cake.