Very fast and easy! Just the recipe to use up the blueberries I threw in the freezer last summer. I bake very little because I try to avoid sweets, so was thrilled to find this great recipe. No fat in it at all! Finally something my husband and I can take in lunch bags and not feel guilty. Thanks! I made 21 muffins using the "large" size muffin papers and reduced backing time by a minute or 2 as they were slightly smaller. 18 muffins would be good-sized ones - I would have needed the "extra-large" muffin papers.