Maybe one day I'll write up a post of the many combinations of sour cream, heavy cream, buttermilk, whole milk, and the ingredients that thickens the sauce and/or cheese. But that day is not today. Here is how to make sour cream from scratch if you happen to have run out of it or just wanted to make a party chip dip. This will be thinner than store-bought sour cream because it lacks thickeners such as carrageenan, a seaweed extract.
No lemons? Substitute lemon with an equal amount of white vinegar.
Ingredients
1 c (8 oz) heavy cream
2 tsp fresh lemon juice
1/4 c (2 oz) whole milk
Directions
Like the crème fraîche, you'll want to use a clean pint size mason jar.
To the jar, add the heavy cream and lemon juice. Give it a stir to mix together. Add milk. Cover with a lid and shake a bit. Remove the lid and cover with cheesecloth, secured with a rubber band around the rim. Let sit on the counter for up to 24 hours, or overnight.
The mixture should have thickened.
Why this process requires the cream to 'breathe' while the crème fraîche does not. I have no idea. Maybe you don't want extra 'flavors' in the crème fraîche.
Remove the cheesecloth and give the mix a stir. Cover with a lid and refrigerate for up to 2 weeks.
