Yes and yes.
The same amount.
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.
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.
Yes
Yes, for one cup of shortening use one cup of butter.
Vegetable Shortening
Sometimes it is used as a substitute for butter.
yes it will curdle. High Ratio Shortening contains emulsifiers that allow it to hold a large amount of liquid without curdling. do NOT substitute regular shortening or butter into a recipe that specifically says High ratio or emulsified shortening.
A substitute for Bisquik can be made with flour, baking powder, salt, and oil, shortening, or butter.
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.
But yes, in fact if you substitute shortening for butter in the tollhouse cookie recipe they will come out big and stay soft.