2 cups heavy cream
1/2 cup buttermilk
Pour into a qt. glass jar/container. Stir to mix thoroughly. Put the lid on and tighten then back it off just a bit.
Place in a warm spot not drafty area. On top of the stove if not using or in the oven are excellent places.
Leave for 24 hrs. then stir with a wooden spoon and if not thick enough let it sit 4 to 8 hrs.
(may take longer, depending on the place you have it) and check again. This needs to be the thick like the kind you buy.
Use within three weeks.