Stir together 4 cups flour, 1 teaspoon baking powder and 1 teaspoon salt. Add the 2 cups plain yogurt and stir until the dough comes together well, adding more flour if necessary.
Knead the dough for 5 minutes.
Place the dough in an oiled bowl, covered with a towel, and allow to rest for an hour or longer. (This can rest overnight)
Take out the dough and cut it into 10 equal pieces. Roll each piece into a ball and then flatten into a disc. Roll each disc out with a rolling pin until 1/4 inch thick and about 8 inches in diameter.
Heat a large nonstick frying pan or griddle over medium heat. Also preheat your oven broiler to high.
One at a time, take each piece and cook over medium heat for 4-5 minutes, until the bottom is browned and it is starting to puff up. Slide a spatula under the naan and transfer it to the top rack of the oven. Allow the top to continue cooking for a minute or two, until nicely browned and puffy.
Remove from the oven and brush with melted 3 tablespoons butter if desired.
Cilantro Mint Chutney
Place 1 cup cilantro leaves, 1/2 cup mint leaves, 1 jalapeno, 1 teaspoon cumin, 1/2 teaspoon salt, and 2 teaspoons lemon juice into blender and process until everything is crushed and combined.
Add water, 1 teaspoon at a time, to form a smooth paste.
Adjust seasonings as desired with additional salt, lemon juice, or spices.
Serve alongside the naan.
Notes
How to make ahead + storeStore the naan in an airtight container, wrapped in saran wrap, or in a ziploc bag for up to five days. You can also freeze naan for up to three months.