Sift 500 g flour, 0.3 g baking powder and 0.3 g salt together into a large bowl.
Whisk 1 egg in a separate container, then stir in 129 g milk, 6.3 g granulated sugar and 150 g melted butter.
Create a well in the flour mixture, pour in the liquid ingredients, and incorporate them into a pliable dough, splashing in a little water if needed. Work the dough on a lightly floured counter for 5 minutes.
Transfer the dough to a lightly oiled bowl, drape with a damp cloth, and let it stand in a warm environment for 1 hour.
Portion the rested dough into 8 equal pieces, shape each into a ball, and coat them with a thin layer of melted butter. Rest for 30 minutes.
Working on a floured surface, stretch and roll each ball until paper-thin. Fold the dough into accordion-style pleats, roll the pleated strip into a tight coil from one end, and let it relax for 10 minutes.
Roll each spiral flat into a disk approximately 1 mm thick.
Warm a non-stick frying pan over medium heat. Fry the parathas individually for 2 to 3 minutes on each side, basting with butter throughout, until crisp and speckled with light golden patches.
Use 25% of the baking powder's weight (e.g. 1 g for 4 g) and add 2 g cream of tartar or 1 tsp lime juice per 100 g flour. Mix quickly and bake at once.
For binding, use about 10 g chickpea flour mixed with 20 ml water per egg and rest for 10 minutes. Denser and nuttier; not suitable for baking or coating in the same way.