Saute the celery and onions in the butter in a pan on medium heat until vegetables become translucent but not mushy, about 10 minutes. Add the corn, wine, stock, turkey, and cream and reduce heat to low.
Mix the the rosemary into the pancake mix in a bowl and then stir in the buttermilk. With a soup spoon, drop scant spoonfuls of the sticky dough on top of the simmering liquid, cover with a lid, and simmer for about 15 minutes or until the top of the dumplings are dry to the touch. Serve with big spoons!