Mix flour, baking powder, and sea salt. Make a well and add yogurt and water, a bit at a time. Knead with hands until it comes together. If you over knead, add more flour. Optionally, add olive oil to bring it together really easily.
Let the dough rest for about 15 minutes while you make the cilantro garlic butter topping. Simply mix the cilantro, minced garlic, and butter in a small bowl.
Separate the dough into 5-6 pieces.
Heat a cast-iron skillet over medium heat. When has clearly heated all over, roll out the dough to ¼-inch thick and place on the skillet.
Flip when the surface of the naan has risen with bubbles, which usually takes 2-3 minutes on a well-heated cast-iron. Cook on the other side for around the same amount of time. Be careful not to let the naan burn!
As soon as the naan is off the skillet, spread the cilantro garlic butter topping.
Repeat with the rest of the dough.