Banana Blueberry Bran Muffins
["1 c. mashed ripe banana", "3/4 c. buttermilk", "1/4 c. light brown sugar", "1 large egg", "2 Tbsp. vegetable oil", "1 1/2 c. unsifted all-purpose flour", "2 tsp. baking soda", "2 tsp. ground cinnamon", "1/2 tsp. salt", "1 c. blueberries"]
["Preheat oven to 350\u00b0.", "Place liners in 12 (1/2-cup) muffin cups or lightly grease."]
["mashed ripe banana", "buttermilk", "light brown sugar", "egg", "vegetable oil", "flour", "baking soda", "ground cinnamon", "salt", "blueberries"]