Some home cooks—frustrated that the fine, natural cheeses they buy don't melt well—are resorting to making their own processed cheese. A recipe from "Modernist Cuisine at Home," a best-selling cookbook that emphasizes food science, recommends using an immersion blender to mix a small about of sodium citrate, an emulsifier, with water, then heating the liquid and slowly adding shredded cheese to make macaroni and cheese sauce.
"The resulting texture is as smooth as melted American cheese, but as complex and intense in flavor as any of your favorite cheeses," states the recipe on Modernistcuisine.com.
Re-post of Melissa Clark's video with Nathan