Mix all ingredients, except blueberries. Gently fold in 1 cup freshblueberries. Spoon into muffin tins that have been sprayed with cooking oil, until 3/4-full. Bake at 400 degrees for 18 to 20 minutes. When done, a toothpick inserted into the center will come out clean. Note: If you prefer not to spray the muffin tins, place a paper baking cup liner for each muffin. These are really great muffins--enjoyable for everyday, but elegant enough for company!