I make these all the time and keep them in the freezer for a quick breakfast. I use whole wheat PASTRY flour and frozen blueberries that I picked from the blueberry farm in the summer. However, I don't let them thaw as it turns the muffins slightly blue. I use muffin tins sprayed with non-stick cooking spray as some reviews mentioned that they spread. This is not a really sweet tasting muffin, but my sweet tooth has subsided since I started Weight Watchers, so I really enjoy these.