To achieve restaurant-quality creamy scrambled eggs, you should use a non-stick skillet and cook over low heat. Do not use heavy cream or milk, as traditional French technique relies solely on butter and slow cooking. Whisk your eggs thoroughly before adding them to a cold or low pan with a pat of butter.
Stir continuously with a rubber spatula, pulling the eggs from the edges to the center. Remove them from the heat slightly before they look fully done, as residual heat will finish cooking them without making them tough. This process usually takes about 5 to 7 minutes. Basic supermarket eggs work fine if you control the temperature carefully.