The evening before making, grow the sourdough.  Mix the following and let set out all night.

• 1 cup of sourdough culture that is the consistency of pancake batter
• 3 cups flour
• 1 1/2 cup of warm water

The next day:

1. Melt butter, add salt and milk.
2. Add butter mixture to muffin dough; stir.
3. Add 3 cups of flour and baking soda to dough.
4. Knead, adding flour as needed.
5. Divide dough in two.
6. Roll out one portion to 1/2 inch thick.  Cut 4-inch diameter muffins. Place on baking sheets that have been sprayed and cornmeal sprinkled over.
7. Let rise 3-5 hours, depending on how warm your kitchen is.
8. Preheat pancake griddle to medium heat.
9. Spray griddle and place muffins on griddle.  Cook each side for 6-8 minutes.
10. Cool on wire racks.

add to dough:

• 3 cups flour
•