Yes you can :) A good oil to use is canola because it's virtually taste-less. Olive oil is fine but may give your dessert a slightly olive-y taste. I love using coconut oil because it most resembles butter (solid at room temperature) and I love the subtle creamy/ coconutty flavor it has.
it burns very quickly so i doubt it. maybe if you make a sesame butter that could be interesting.
You can, but you'd have olive-flavored cake. Try using Extra LIGHT olive oil instead--it's been filtered so that all the olive-flavor is pretty much gone
Yes
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Yes, eggs and oil are required when making cake mix, whether or not fruit of any sort is added.
Yes, I always do.
You could substitute shortening for oil in a cake mix, but it is not recommended. The resulting cake made with shortening will have a noticeably different texture and mouthfeel. Yes you Can. Shortening.. or Hydrogenated Oil is basically poison anyways.
1 cup
If you are substituting oil for butter in baking use about the same volume.
No. If a cake mix calls for oil, an extra egg instead of the oil will not give good results. The oil is to give the cake moistness, so an extra egg will not only make it heavier and more dense, but it will also be very dry.
Yes.
yes
well if you use Betty cake mix you can make 24 mini cupcakes
I know that if you are using a cake mix, you can use a can of diet soda instead of the oil and eggs (Weight Watcher tip : ) ), but I don't know how it works when you make a cake from scratch. I suppose you could always give it a shot and see what happens. Also, just a warning, the cake won't rise as much as when you use oil and eggs. It will taste fine though; it'll just be a little bit denser.