Preheat oven to 350 F, grease and flour a 12 cup bundt pan and set aside

In a medium bowl, whisk together the flour, baking powder, baking soda and salt, set aside

In a large bowl, ceram together the butter, sugar, and lemon zest until light and fluffy

Beat in the eggs one at a time, followed by the vanilla

Add half the flour mixture, then half of the sour cream and repeat to use all, mixing well after each addition

Fold in the blueberries

Pour the batter into prepared pan, then bake in preheated oven for 50-60 minutes, or until toothpick inserted in the center comes out clean

Allow to cool 10 minutes before inverting and cooling completely on a wire rack