Dissolve yeast in warm water, let stand 5 min. combine with butter and flour.
Stir in egg, and sugar, cover and refrigerate overnight.
Fill greased muffin tins with batter 2/3 full. Bake at 350* for approx. 24 min. enjoy!!!!
Batter will keep in frig, for upto 3 days...But it won't last that long, anyway!!