Can you use solid shortening in place of oil?
Yes, but the results might not be the same. Liquid oil and solid shortening have slightly different properties. You might need to use slightly less oil for similar results, when "creaming" shortening the results do not work for oil, but this step would be dispensed with when using oil. Butter or lard, which shortening was designed to replace, will get the same results as shortening.
How much vegetable oil would you substitute for a recipe that calls for 2 tablespoons of shortening?
I would think the same amount. But, you won't get the same results. Shortening is a saturated fat like lard or butter. Oil is an unsaturated fat. You won't get at all the same results. I would sub butter. If you are veg and you dont want to use animal fat but you are trying to avoid the trans fats in solid vegetable shortening, use palm oil or coconut. These are naturally solid at room…