Follow this step-by-step guide to create the most delicious sopaipillas:

1. Mix Dry Ingredients: In a large bowl, whisk together the flour, baking powder, and salt until combined.
2. Add Oil: Stir in the vegetable oil until it resembles coarse crumbs.
3. Add Water: Gradually add warm water, stirring until a soft dough forms.
4. Knead the Dough: Transfer the dough to a floured surface and knead gently for about 2-3 minutes until smooth and elastic.
5. Rest the Dough: Cover the dough with a clean kitchen towel or plastic wrap and let it rest for about 30 minutes.
6. Roll Out the Dough: After resting, divide the dough into small balls (about the size of golf balls). Roll each ball into a circle about ¼ inch thick.
7. Heat the Oil: In a deep pot or skillet, heat oil over medium heat. Check if the oil is hot enough by dropping a small piece of dough into the oil; it should bubble immediately.
8. Fry the Sopaipillas: Carefully place a rolled-out dough circle into the hot oil. Fry until golden brown and puffy, usually about 2-3 minutes per side.
9. Drain Excess Oil: Use a slotted spoon to remove the sopaipillas from the oil and place them on paper towels to drain excess oil.
10. Repeat: Continue the process with the remaining dough circles until all sopaipillas are cooked.