Ingredients

• 2 cups plus 1 tablespoon all-purpose flour
• 1 teaspoon kosher salt
• 1/2 teaspoon baking powder
• Olive oil (for greasing)
• 1 cup (2 sticks) unsalted butter, softened, divided

Instructions

1. Whisk flour, salt, and baking powder in a large bowl. Make a well in the center and slowly add 2/3 cup water, mixing with your hands or a wooden spoon, until a shaggy dough forms. Knead dough in bowl until smooth and elastic, about 4 minutes. Transfer dough to a clean work surface. Wipe out bowl and grease lightly with oil. Return dough to bowl, cover with a kitchen towel, and let rest 30 minutes.
2. Turn out dough onto a clean work surface. Using a bench scraper or large knife, cut into 6 equal pieces. Shape into balls, cover, and let rest 15 minutes more.
3. Grease a large cookie sheet or the underside of a rimmed baking sheet with 1 Tbsp. butter. Line another rimmed baking sheet with parchment.
4. Place 1 piece of dough on prepared cookie sheet. Pat down to a flat oval with your fingertips, then smear 2 Tbsp. butter over dough. Press and slide dough outward with your fingertips, stretching to a very thin oval, about 12x10".
5. Starting at 1 long end, roll dough over itself to create a long tube about 1" wide; flatten slightly. Starting at 1 short end, roll into a coil like a jelly roll. Transfer to parchment-lined sheet; cover with a kitchen towel. Repeat with remaining dough. Freeze, covered, 15 minutes.
6. Working one at a time, turn coil on its side and flatten to a disc with your palm. Using a rolling pin, roll into a rough oval about 8x4". Transfer to freezer. Repeat with remaining coils and freeze until ready to use.
7. Heat 1 Tbsp. butter in a griddle or large nonstick skillet over medium-high. Add 2 pieces of dough, reduce heat to medium, and cook flatbread until bottom is golden brown with large bubbles forming underneath, about 3 minutes. Flip and continue to cook until second side is golden brown, about 1 minute more. Repeat with remaining dough, adding 1 Tbsp. butter before each batch.