If you want a substitute for healthy reasons, I suggest using coconut oil. It's good for you and tastes good. Otherwise, organic's always better!
Butter is shortening. It's also a natural product without - in most countries - artificial additives enhancing its flavour or colour, unlike margarine, which cannot be made without various additives.
If you must use margarine or oil as shortening your recipe will end up acceptable, provided you check your quantities carefully, but it won't be the same as if it was made with real butter.
Yes
Yes and yes.
Yes, for one cup of shortening use one cup of butter.
Vegetable Shortening
Sometimes it is used as a substitute for butter.
A substitute for Bisquik can be made with flour, baking powder, salt, and oil, shortening, or butter.
Use the same amount of butter as you would shortening. In bread, a tablespoon of butter can be used instead of a tablespoon of shortening. The same amount of canola oil is even healthier.
The same amount.
use butter flavored Crisco
Vegetable oil and butter are two types of shortening. All fats and oils are shortening, and can be substituted for each other, but this will affect the flavour and texture of the food, as some shortenings have stronger and different flavours, and also have different melting points.
it should be a little less, however, if you MUST substitute butter, you are better off to use margarine, you will find that it tastes better than shortening.
Margarine, like butter, is a shortening agent; applesauce won't replace margarine in recipes calling for shortening.