no!!
By eating your sandwich
Nope. Sour cream has to do with One certain ingredient and Sour ice cream is like sour milk but the sour in the ice cream is the milk:)
upset stomic or diareea
Eating a big potato with with butter and sour cream.
no sour cream won't make a cake rise. i am 9 and still a food expert.
Yes because it would suggest it had gone off.
with cucumbers sour cream and cream cheese
Through a fermentation process. A good example would be to find a recipe using sour cream; it will probably explain how to make the cream sour. If a recipe calls for sour cream (or sour milk) add a few drops of lemon juice or vinegar and leave until it sours. You can also buy sour cream at the supermarket.
I think you are talking about Crème fraiche (French for "fresh cream"). It is a soured cream containing about 28% butterfat and a pH of ~4.5. It is soured with a bacterial culture, but is thicker, and less sour than sour cream.
with cucumbers sour cream and cream cheese
Milk