You can use any other oil or lard. Cream and other milk products may contain enough fat to have much the same effect as the butter on the texture and taste of your cake. As for fat-free options you could search for and experiment with vegetable gums such as Guar Gum, Pectin, Xantham Gum, etc... that are used in industrial baking as fat substitutes.
You can usually use either salted or unsalted butter or margarine in a cake.
Yes you can. Butter will add more colur to the cake and also makes it slightly lighter, but the increased fat content may be damagaing to people's health.
Yes you can.
yes you can, it just won't taste as good.
YesA different answer:Butter is a major ingredient in pound cake and the primary source of flavor. Substituting margarine for butter might produce a cake, but it would be an imitation of a pound cake, just as margarine is an inexpensive imitation of butter.
do you want a salty cake
Yes, might taste a little different but still delicious!
You need to do it with butter
Yes, you can but only for cakes that require the use of oil. If you use it for other cakes requiring butter it won't have the same flavour.
Yes, for one cup of shortening use one cup of butter.
Use more butter?
Might be too heavy, leading to soggy or a dense textured cake. You can substitute applesauce-the amount is half of what the recipe calls for.
Butter can be used instead of shortening for fondant. Other ingredients needed with this recipe include corn syrup, vanilla and salt.
You can use shortening, butter or margarine, or even mayonnaise or lard in some recipes. Actually, many chocolate cake recipes call for mayonnaise instead of oil or butter. Just keep in mind that margarine has a higher water content than butter, so you may want to use all butter or half butter/half margarine if that's the substitution you choose.