Food Nut wrote:I use my blender when making cheese sauces that tend to separate. Pour about half of the bechamel into the blender and add the shredded cheese.
Blend. Then continue with recipe. Perfectly smooth cheese sauce....
The flour in the béchamel acts as an emulsifier, but it's not very efficient. The béchamel gives good texture to the cheese sauce, though it blunts the cheese flavor. The recipe from
Modernist Cuisine isn't the only (or best) way to make mac and cheese but it's interesting to try.
toria wrote:All good points. I knew there was a scientific explanation why cooks of old used Velveeta even though I generally try to avoid it. Evaporated milk does seem to make a smooth sauce along with careful melting. Separated cheese, grainy cheese are all undesirable but there are a few tricks around it.
Evaporated milk contains potassium phosphate and carrageenan, both efficient emulsifying agents (at least both Carnation and PET brands have these two additives).
JoelF wrote:I don't remember where I read it, but the key to velveeta's smoothness is sodium citrate, an emulsifier. I don't know if citric acid (which is easily found, and we have in our kitchen) can be used to improve stability of cheese sauces, perhaps balanced with some baking soda?
As mentioned six posts up, Velveeta actually contains a lot of sodium
phosphate (and only a little sodium citrate) which has similar emulsifying properties. While the recipe from
Modernist Cuisine linked to above uses sodium citrate, you could make your own from citric acid and sodium bicarbonate (the carbon dioxide and water also produced would be inconsequential). The trick would be getting the ratio correct (granted, not a huge problem). You don't want too much acid (sour taste and inefficient emulsification) or too much base (bitter taste). Sodium citrate can easily be mail ordered and it sounds like something that would be fun to have around the kitchen.