Polskie Nalesniki (Polish Pancakes) (Polish Dessert)

Add the flour, eggs, milk, water and salt to a large bowl and then mix with a hand mixer until you have a smooth, lump-free dough.
At this point, add the butter or vegetable oil. Alternatively, you can use them to grease the pan before frying each pancake.
Heat a nonstick skillet over medium heat, then pour in the batter, rotating the pan to help it spread.
When the pancake starts to pull away from the sides a little and the top is no longer moist, flip it over and cook briefly on the other side as well.
Transfer to a plate. Cook the remaining dough until it is gone.
Serve hot, with the filling of your choice.

foods：
1 cup of flour
2 eggs
1 cup of milk
3/4 cup of water
a pinch of salt
1 teaspoon sugar
3 tablespoons of butter