Sift together the flour, sugar, and baking soda in a large bowl. Slowly add the egg and milk while stirring constantly until smooth.
Place a skillet over medium heat. Lightly coat with butter.
Pour 1/8 cup of batter into the skillet. Cook until bubbles appear on the surface of the batter; flip and continue to cook until lightly browned on the bottom, 1-2 minutes on each side. Reapply butter to the skillet between batches.