Here's the recipe if you want to give them a try. I did adapt it a bit (as usual...) and this is what I did.
3 c. whole wheat flour
2 c. kefir (or yogurt or buttermilk)
2 eggs, lightly beaten
1 t. sea salt
1/4 c. maple syrup
2 t. baking soda
1 t. vanilla extract
3 T. melted butter
Directions: Mix flour in kefir. Blend in remaining ingredients. Pour into well buttered muffin tins (preferalby stoneware), filling about half full. Add about 5 blueberries then add more batter until about three quarters full. Top with about 5 more blueberries. Bake at 325 degrees for about 1 hour or until a toothpick comes out clean.
I froze some as well which works out great for my son who's an early riser. He can just go grab a muffin until I can get breakfast ready.
Hope you try them!