Heat the butter in a nonstick pan or a cast-iron skillet over medium-low heat until it melts and foams.
Crack the eggs into the pan. Sprinkle with a pinch of salt and pepper.
Let the eggs cook undisturbed for 2–3 minutes, until the whites have set and look fully opaque.
Carefully flip each egg with a thin spatula. As soon as you flip, gently break each yolk with the spatula’s edge, pressing it down so it spreads beneath the white.
Cook for another 2–3 minutes, until both the yolks and whites are firm and the edges are a little crisp.
Remove the eggs from the pan and serve immediately.