These are outstanding! I've used strawberries and blueberries for this recipe instead of raspberries. Both turned out beautifully! I have been sprinkling just a touch of raw turbinado sugar on top before I bake them....yum! I use butter instead of oil. I don't have a food processor, a blender works fine. Also, I used the tip about the lemon juice with nonfat milk to sub for the buttermilk. I added wheat germ and flax seed. Really delicious muffins!
Marie1225, Raleigh, NC