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 2-3 T flour. Fold berry mixture gently into creamed mixture. Pour mixture into a tube pan which has been buttered and coated with sugar.
Bake in preheated 325F oven for 1 hour and 15 minutes.
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Cathy Hockel's Blueberry Pound Cake recipe