How can you make homemade sour cream?

My parents just went to a farm and came home with a lot of milk, and they want to make some sour cream. Now ,I tried finding some ideas online but all require buttermilk? I dont know what that is? Are there any recipes that dont require this?How can you make homemade sour cream?
Buttermilk is the liquid leftover from making butter, then is left to curdle for awhile. You can make a type of buttermilk by adding a tsp of apple cider vinegar to a cup of milk, but its not quite the same. I make sour cream by just letting fresh, raw cream (from my cows) sit on the counter for about 12 hours. If your parents milk is raw, you can do that to, but if its been homogonized or pasturized, it won't work the same.How can you make homemade sour cream?
Make your own homemade sour cream from heavy cream and buttermilk or more sour cream. Plan ahead to give the sour cream 24 hours to thicken up and chill.


Prep Time: 24 hours,


Cook Time: 5 minutes


Ingredients:


1 cup heavy cream


1/4 cup sour cream or buttermilk


Preparation:


Mix heavy cream and sour cream or buttermilk in a screw-top jar, cover, and let stand at room temperature about 24 hours until very thick.





Chill homemade sour cream well before using and keep refrigerated.





Yield: 1 cup








Buttermilk -


Ask your local shop assistant. I am sure you can buy it is the supermarket.
Prep Time: 24 hours,





Cook Time: 5 minutes





Ingredients:





1 cup heavy cream


1/4 cup sour cream or buttermilk


Preparation:





Mix heavy cream and sour cream or buttermilk in a screw-top jar, cover, and let stand at room temperature about 24 hours until very thick.





Chill homemade sour cream well before using and keep refrigerated.





Yield: 1 cup





Recipe Source: The New Doubleday Cookbook by Jean Anderson %26amp; Elaine Hanna (Doubleday)


Reprinted with permission.
You have to find NATURAL buttermilk which has been made with a natural culture. Its not hard to find. Also you can search for online sources for cultures with which to make different dairy products. Once you have made a batch you keep it going. You use 1 cup buttermilk to make a quart but don't use it all up save a cup for the next batch. Here are some sources for cultures:New England Cheesemaking Supply


(413) 628-3808


www.cheesemaking.com


Starter cultures, cheese molds and books.





Marilyn Jarzembski (419) 237-3095


marilynjarz@yahoo.com





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1 cup (8oz.) cottage cheese


3 tbsp. dry milk powder


1/4 cup water


( May use 2-3 tbsp. milk in place of the dry milk powder%26amp; water.)


1 tbsp. lemon juice


a dash of sugar or artificial sweetener if desired.





Process in blender until smooth.
a substitute for butter milk is (if i remember correctly)


for every cup of milk, 1 tbsp. acid (ex: lemon juice)


hope i helped