From America's Test Kitchen Season 12: Rise and Shine Breakfast
Scrambled eggs should be a foolproof, go-to breakfast. Yet surprisingly, we’ve successfully created our ideal scrambled eggs only a handful of times. More often than not, they’re tough and dry. For moist and fluffy eggs with soft, big curds, we found it necessary to cook them over high heat, which creates enough steam to properly puff the eggs. Salt helps produce tender curds while gentle beating avoids a tough scramble. The addition of half-and-half provided just enough richness without making the eggs dense and a couple extra yolks boosted egg flavor. Lowering the heat at the end of cooking ensured the eggs didn’t overcook.
It's important to follow visual cues, as pan thickness will affect cooking times. If using an electric stove, heat one burner on low heat and a second on medium-high heat; move the skillet between burners for temperature adjustment. If you don't have half-and-half, substitute 8 teaspoons of whole milk and 4 teaspoons of heavy cream. To dress up the dish, add 2 tablespoons of chopped parsley, chives, basil, or cilantro or 1 tablespoon of dill or tarragon to the eggs after reducing the heat to low.