Warm a mixture of whole milk and buttermilk over medium heat until it reaches about 185 degrees (you'll see a ring of bubbles appear around the inside of the pan). Remove the pan from the heat and stir in vinegar (regular old distilled white … the stuff you probably now use for washing windows). Let it stand about 5 minutes until curds form, then gently lift them off with a slotted spoon and drain in a strainer.
I must confess I haven't made this yet. I'll come back with a report once I do.
This recipe was donated by my daughter Lauren who also hasn't made it yet.