In a large mixing bowl, combine the flour, salt, and baking powder.
Add the melted butter and warm water to the dry ingredients.
Mix until a dough forms, then knead on a lightly floured surface for about 5-7 minutes, or until the dough is smooth and elastic.
Cover the dough with a clean cloth and let it rest for about 30 minutes.
Divide the dough into small balls, about the size of a golf ball.
Roll each ball into a thin circle, about 1/4 inch (0.6 cm) thick.
Use your finger to poke a small hole in the center of each circle to help them cook evenly.
In a large skillet or deep fryer, heat the vegetable oil over medium-high heat until it reaches 350°F (175°C).
Carefully place the dough circles into the hot oil, frying a few at a time to avoid overcrowding.
Fry each side for about 2-3 minutes, or until golden brown and crispy.
Use a slotted spoon to remove the tortas fritas from the oil and transfer them to a paper towel-lined plate to drain excess oil.
Dust the tortas fritas with powdered sugar if desired.
Enjoy your meal!