In a mixing bowl, whisk together the flour, milk, eggs, melted butter, sugar, and salt until you have a smooth batter.

Allow the batter to rest for about 15 minutes.

Place a non-stick skillet over medium heat and lightly grease it with butter or oil.

Pour about ¼ cup of batter into the skillet, tilting it to spread the batter evenly.

Cook for 2-3 minutes until the edges lift and the bottom is golden.

Gently flip the crepe using a spatula and cook for another minute.

Transfer the cooked crepes to a plate and repeat with the remaining batter.

Fill the Nalesniki with your choice of sweet or savory fillings, then roll or fold them.