Blue Ribbon Blueberry Muffins

Makes 6 big muffins
2 1/2 cups flour
2 tsp Baking Powder
1 tsp Baking Soda
1/2 tsp cinnamon
1 pinch salt
1 1/2 cups brown sugar
2 tsp vanilla
1 egg
2/3 cup vegetable oil
1 1/2 tbsp orange juice concentrate
1 cup buttermilk
2 cups blueberries

Mix together flour, baking powder & soda, cinnamon & salt. In another bowl mix: brown sugar, vanilla, egg, oil and orange juice. Mix, then add buttermilk.
Add dry ingredients to wet, and then add blueberries. Bake at 400°F for 15 minutes, and then reduce heat to 350°F for 15 minutes more.