Blend the eggs and milk for about 30 seconds until the mixture looks airy and has nearly doubled in volume. The surface should look lightly foamy rather than flat, which tells you the eggs are well incorporated.

Add the flour, melted butter, sugar, and salt, then blend for 15 to 20 seconds until the batter is smooth. Stop as soon as everything comes together so the batter stays silky and pours like light cream.

Set a nonstick or well-seasoned cast iron pan over medium heat and let it warm fully before adding batter. When the batter hits the pan, you should hear a faint sizzle instead of silence.

Pour in about 1/4 cup batter with one hand and immediately tilt the pan with the other hand to sweep the batter outward into a thin layer. Move quickly here, because once the edges begin to set, the pancake will stop spreading and the rim can turn thick.

Cook the pancake for about 1 minute, until the underside is golden brown and the top looks dry across most of the surface. Right before flipping, the top takes on a look a bit like aged cheese, with a matte finish and tiny dry patches.

Slide a spatula under the edge, lift gently, and flip the pancake once the edge releases cleanly from the pan. The thin rim should feel delicate but not wet, and the second side needs only 15 to 30 seconds to finish.

Transfer the pancakes to a plate and serve them flat, folded, or rolled with jam, yogurt, or whipped cream. They should bend easily without cracking when they are cooked to the right thinness.