I have a similar recipe that I got from my mother. Mine calls for 1 stick of margarine, 1/2 cup crisco and no salt. There are a couple of problems that people seem to have with this recipe. The first is that you must whisk the flour into the milk until you do not see any more clumps. Then you need to cook the mixture over medium heat and constantly stir until it thickens into a paste. Which is sort of a pain but well worth the effort. The second problem is that you must wait until the flour mixture is completely cool before combining with other ingredients. This is key. I use my recipe all the time. Goes great with chocolate chip banana cake.