The most misunderstood ingredient in our diet is the common chicken egg.
It's one of our more nutritious staples yet is feared as potentially one of the deadliest.
It's as commonplace as table salt yet is the most important chemical and physical ingredient in many of our favorite sauces and pastries.
You begin with a runny, unappealing liquid, throw it into a pan and within about three minutes it transforms into a solid that you can cut with a knife.
You can take the same egg and, instead, separate out the white and whip it until it forms a dense foam that can then be baked into a meringue for a pie. Similarly, the yolk can be used to enrich chocolate into truffle, or it can be slowly heated and whipped into a sauce to thicken it.
We use eggs to hold our meatloaves and crabcakes together, add leavening to chocolate tortes and glaze a loaf of bread.
No other kitchen ingredient is so versatile and useful. And, yet, it's also one of the most feared, for its cholesterol and salmonella.
Which is very too sad because
that same yolk, "laden with cholesterol," also contains most of the egg's total vitamins and about half of the total protein. (Makes removing the yolk kind of pointless, doesn't it?)
And, while it is abolutely true that deadly salmonella can be contracted from poorly handled eggs, a recent USDA analysis (
Risk Analysis April 2002 22(2):203-18
) showed that
only 1 in 30,000 eggs has any trace of salmonella at all. And that less than a third of those contaminated eggs will actually result in someone becoming ill.
OK, glad that's out of the way! Let's go over some useful tips for handling and use of eggs.
If you need to test the freshness of an egg, you can do so by dropping it into a bowl of cold water.
The quicker it sinks, the fresher it is. If it actually floats, get rid of it. This is due to the air pocket at the blunt end of the egg. This air pocket starts out very small and, as the egg ages, becomes larger.
Freshness of the egg affects the finished product of your dish.
When cracked into a pan for frying, an older egg will "lay flatter" in the pan, the white will appear less cloudy and the yolk breaks more easily. An old egg will make a weaker foam when whipped and it also loses some of it's binding abilities.
When quality of ingredients is especially critical, such as for mayonnaises, sauces, custards, and pastry, buy your eggs on the day you plan to use them.
A few quick tips for proper egg storage and such:
- Egg quality deteriorates as much in a day at room temperature as in four days in the refrigerator.
- Agitation thins the white, so storage on a shelf, out of the way is better than in the door.
- Moisture loss causes egg quality to deteriorate, so eggs should be stored in an air tight container.
- Properly kept, eggs should last for several weeks in the shell. Once broken, use them immediately.
- Egg whites flat out will not whip if they come into contact with even the slightest trace of fat, grease or egg yolk.
Chicken eggs supply a large amount of protein, and provide significant amounts of vitamin A, riboflavin, folic acid, vitamin B6, vitamin B12, choline, iron, calcium, phosphorus and potassium.
Eat your eggs. And have a productive day!
Bon Appetit!