1 quart milk
Scald milk to 160-180 degrees F. Cool to 105-115 degrees
Stir in purchased yogurt culture or if using other prepared natural yogurt for culture add 1/4 to 1/2 cup of chosen yogurt. Stir until smooth.
Pour into quart jar and lid.
Put in plastic bag.
Put in cozy for 4-6 hours.
If you don't have a cozy that fits a quart jar, you may use towels, blanket, or other padded fabric wrapped around warm quart of prepared milk.
To sew your own cozy... with ample padding, create a cylinder with a padded bottom that will fit around a quart jar.... sew a little padded top to fit in the hole.