Heat butter in a nonstick skillet over medium-high heat until it's hot and foamy.
Break eggs and gently slide into pan, one at a time. Reduce heat to low immediately.
Cook slowly until whites are completely firm and yolks begin to thicken but are not hard.
Carefully slide a spatula under each egg and flip. Cook until desired doneness.
Gentle heat ensures even cooking and prevents eggs from becoming tough and rubbery.
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How to Cook an Egg >