Beat together butter, 1 cup sugar and cinnamon, continue beating until light and fluffy. Reduce mixer speed and beat in 2 cups flour until well blended and mixture is crumbly. Set aside 1 cup of crumbly mixture.

Mix remaining flour, baking soda, baking powder and salt until well blended. Add remaining 1/2 cup sugar, eggs, sour cream and vanilla. Increase mixer speed and beat for about 2 minutes, stopping to scrape the bowl as needed. Reduce mixer speed to low and mix in the flour mixture and mix until just blended. Fold in 1 1/2 cups blueberries and spoon the batter into the prepared tube pan. Sprinkle the reserved 1/2 cup blueberries around the top of cake, followed by the reserved crumbly mixture.

Bake for about 1 hour or until a cake tester comes out clean. Cool cake in pan for about 10 minutes before loosening from the sides of the pan with a knife. Carefully remove cake from pan by lifting up from the bottom. Cool completely on a wire rack, crumb side up.