Beat eggs in a bowl with an electric mixer until thick and lemon-colored, 3 to 5 minutes. Stir in milk.
Sift together flour, sugar, and salt in a separate bowl. Add to egg mixture; mix until batter is smooth.
Grease a griddle with butter; heat over medium heat. Drop tablespoonfuls of batter on the griddle; spread to make thin pancakes. Cook until light brown on bottom, 1 to 2 minutes. Flip and continue cooking until second side is light brown, 1 to 2 minutes more. Repeat with remaining batter.