2 1/4 cups flour
1 cup sugar
1 teaspoon baking powder
1 teaspoon baking soda
1/4 teaspoon salt
2 eggs, beaten
1 cup buttermilk
3/4 cup vegetable oil
2 tablespoons orange juice concentrate
2 cups blueberries
1 cup chopped walnuts 

Preheat oven to 350 degrees. Grease a 12 cup bundt pan. In a medium bowl combine dry ingredients. In a large bowl blend together eggs, buttermilk, oil and orange juice concentrate. Add dry ingredients, mix thoroughly. Fold in blueberries and nuts. Spoon into pan. Bake 45 minutes or until toothpick inserted in middle of cake comes out clean. Cool in pan on wire rack for 1 hour before inverting onto plate. Garnish with whipped cream.