sweet yeast muffin'bug'

Has anyone a recipe for sweet muffin pan muffins using a yeast 'bug'. These were unusual but delicious? The only drawback was that the yeast bug had to be fed daily and then divided in half every week, and afdter a while the family got tired of these muffins. but I would love to know how to start the bug and the muffins as I now have a cafe.