Here's another one for posterity. I found it in my old email box, back when I asked mom for the recipe while living in the dorms:
Begin by preheating the oven to 400 degrees - place well-oiled iron muffin pan in oven while you prepare batter.
Put into blender*: (you can double or multiply by 1.5)
1 cup milk
1 cup flour
1/4 tsp salt
1 1/2 TBSP sugar
1 TBSP melted butter
Blend until smooth; pour into muffin cups about 2/3 of the way. Check at 20 minutes; remove if brown. The magic is the hot oil in the hot pans. They will be popunders if you do not preheat the pan.
*I find they work pretty well if you use mixers. You can actually just mix vigorously, if it comes to that.