what is a good substitute for butter
There is no hard and fast rule for how much oil it takes to replace butter: it varies by recipe. Start with a cake, muffin or cookie recipe. (Stick with butter or shortening for pie crusts). Try substituting one-fourth or half the butter with oil. And don't substitute the same amount: try two thirds to three fourths as much oil. In other words, to replace 4 tablespoons of butter, experiment with a scant 3 tablespoons of oil.