1 cup (2 sticks) butter, softened
2 cups sugar
4 eggs
1 teaspoon vanilla
3 cups all-purpose flour divided
1/2 teaspoon salt
1 teaspoon baking powder
1 pint fresh -OR- 2 cups frozen blueberries, drained

Cream butter and sugar. Add eggs one at a time and beat until light and fluffy. Add vanilla.

Sift 2 cups flour, salt and baking powder together. Add sifted ingredients to creamed mixture and beat. Dredge berries in remaining flour. Fold berry mixture gently into creamed mixture.

Pour mixture into a 10-inch tube pan which has been buttered and coated with sugar.

Bake in preheated 325°F oven for 1 hour and 15 minutes.