Preheat oven to 400 degrees. Mix dry ingredients together. Then mix wet ingredients and mashed bananas together. Add blueberries and fold quickly into dry ingredients. Bake about 20 - 25 minutes until test utensil comes clean. Let cool sightly, remove from baking pan, and glaze with mixture of lemonade concentrate and simple syrup. Dust with granulated sugar. Makes approximately 18-24 muffins, depending upon pan size.
*(Equal parts sugar and water brought to a boil and cooled)