In a medium bowl, whisk together the flour, salt, and baking powder.
Pour in the melted butter and mix with your hands or a spoon until the mixture is crumbly.
Slowly add the warm water, stirring until a soft dough forms. Knead for 2-3 minutes until smooth. The dough should be soft but not sticky—add a tiny bit more flour if needed.
Cover and let it rest for at least 20 minutes (or up to an hour). This makes the tortillas more pliable.
Divide the dough into 8 equal pieces and roll them into balls. Roll each ball into a thin circle on a lightly floured surface.
Heat a dry skillet or cast iron pan over medium heat. Cook each tortilla for 30-45 seconds per side, until bubbles form and light brown spots appear.
Stack tortillas and wrap them in a kitchen towel or tortilla warmer.