Cake oil has two roles: one is to assist in foaming, that is, foaming agent, two is an emulsifier, that is, to play the role of oil and water in the middle of the medium of emulsification, cake oil on the market is only more than a dozen years, 1995 is not before, cake oil is for the second-hand masters to prepare, you if you will be making, do not put the cake oil is the best, excellent flavor, if it is the second-hand or what the third-hand masters, due to the operation of improper essentials, will not do a successful cake, the role of the cake oil is to allow people who do not know to read through the recipe and operating procedures, will do not succeed cake. The essentials are not appropriate, will not do a successful cake, the role of the cake oil is to let people who will not look at the recipe and the operation process, along with the cake can also make eight or nine percent of the cake, which is the charm of the cake oil.