Try this Garlic Mashed Potatoes recipe
Substituting whole milk with low-fat dairy changes the starch-to-liquid equilibrium significantly because lower-fat milks contain more water and less protein to coat the starch granules. Watery dairy increases the risk of producing a sticky paste when mechanical force is applied. Starch molecules inside baking potatoes swell rapidly when boiled, and introducing room-temperature or warmed milk prevents the sudden temperature drop that causes starches to gelatinize unevenly.
Simmering the peeled garlic cloves directly alongside the cubed baking potatoes for twenty minutes softens the sharp sulfur compounds of the allium, yielding a mellow, integrated flavor rather than pungent raw spots. Draining the saucepan thoroughly before adding any other component prevents excess surface moisture from diluting the fats provided by the margarine and parmesan cheese. Removing trapped steam through adequate drainage ensures that subsequent dairy additions absorb properly into the potato matrix.
Using an electric mixer at medium speed distributes the dairy and fats uniformly while shearing the cooked cells just enough to create a smooth consistency. Over-beating ruptures too many starch cells and releases excessive amylose, transforming an airy texture into an elastic, gluey mass that ruins the dish. Stopping the mixer the exact moment the mixture turns smooth protects against this mechanical over-processing.
Employing baking potatoes rather than waxy varieties supplies the high starch content necessary for a fluffy final product. Selecting uniform seven-cup cubed portions guarantees that every piece cooks at the exact same rate during the simmer phase.