Place the flour and salt in a bowl and whisk to combine. Form a well in the center of the dry ingredients and add the eggs, milk, butter, and water to the center of the well. Whisk until a thin batter forms. Transfer the batter to the fridge and chill for 1 hour.
1 cup all-purpose flour, ½ tsp salt, 2 large eggs, 3/4 cup milk, 3 tbsp unsalted butter, ¾ cup water