ISO: recipe for muffins using sour milk and oatmeal

my grandmother used to make muffins that used sour milk and oatmeal. I don't know any thing else about them. but I would really like to find a recipe for them. I remember every time the milk went sour we would take it over to grammmy Freida and she would make these delicious muffins. Being a kid I thought it was magic. Thank you very much