3 T. (1/4 cup) ground whole flax seed
½ t. baking powder
1 t. Splenda (or sugar to taste)
1 t. cinnamon
1 large egg
1 t. butter

Put the dry ingredients into a coffee mug.  Stir.  Add the egg and butter, mix well.  Microwave on high for 1 minute (or more).  1 muffin.
(http://recipes.sparkpeople.com/recipe-detail.asp?recipe=540150)