Step 1: In a large mixing bowl, whisk together the flour, baking powder, salt, and granulated sugar (if using).
Step 2: Add the cold shortening or lard to the dry ingredients. Use your fingertips or a pastry blender to cut the shortening into the flour mixture until it resembles coarse crumbs.
Step 3: Gradually add the warm water, mixing until a shaggy dough forms. Turn the dough out onto a lightly floured surface and knead for 5-7 minutes, until the dough is smooth and elastic. If the dough is too sticky, add a little more flour, one tablespoon at a time. Do not over-flour. This careful kneading is key to a light sopapilla recipe.
Step 4: Place the dough back into the bowl, cover with plastic wrap or a clean kitchen towel, and let it rest at room temperature for at least 30 minutes. This resting period allows the gluten to relax, making the dough easier to roll and ensuring a tender sopapilla recipe.
Step 5: While the dough rests, heat the oil for frying. Pour 2-3 inches of vegetable or canola oil into a heavy-bottomed pot or Dutch oven. Heat the oil over medium-high heat until it reaches 375°F (190°C). Use a candy thermometer to monitor the temperature; maintaining this temperature is crucial for the puffing of the sopapillas.
Step 6: Once the dough has rested, divide it in half. On a lightly floured surface, roll out one half of the dough to about 1/8-inch thickness. Cut the dough into 3-inch squares or triangles using a knife or pizza cutter. Repeat with the remaining dough.
Step 7: Carefully place 2-3 dough pieces into the hot oil, ensuring not to overcrowd the pot. As they fry, gently spoon hot oil over the tops of the sopapillas. This helps them to puff up beautifully. Fry for 30-60 seconds per side, or until golden brown and puffed.
Step 8: Using a slotted spoon or tongs, remove the fried sopapillas from the oil and transfer them to a plate lined with paper towels to drain excess oil. Serve immediately, drizzled generously with warm honey and, if desired, a dusting of powdered sugar or cinnamon sugar. Enjoy your perfect sopapilla recipe!