01 - Whisk together flour, baking powder, baking soda, salt, and sugar in a large mixing bowl until thoroughly incorporated.
02 - Create a well in the center of the dry ingredients. Add egg, water, and 2 tablespoons vegetable oil. Using a spatula, mix until a shaggy, sticky dough forms.
03 - Knead the dough directly in the bowl for 1 to 2 minutes until just combined. The dough will remain tacky—this is expected.
04 - Cover the bowl with plastic wrap and let the dough rest at room temperature for 15 minutes to relax the gluten.
05 - Lightly oil your hands and work surface. Knead the dough for 2 to 3 minutes until it becomes smooth and elastic.
06 - Return the dough to the bowl, cover, and let rest for 1 hour at room temperature until slightly puffed.
07 - Transfer dough to a lightly floured surface. Roll or press into a rectangle approximately 1/2 inch thick. Cut into strips 1 inch wide and 5 inches long.
08 - Layer two dough strips on top of each other. Press down the center lengthwise with a chopstick or knife handle to seal them together, creating the characteristic youtiao shape.
09 - Heat vegetable oil in a deep pot or fryer to 375°F. Maintain temperature throughout frying.
10 - Gently stretch each dough pair to approximately 8 inches in length, handling carefully to avoid tearing.
11 - Lower 2 to 3 sticks into the hot oil. Fry, turning constantly with chopsticks, until puffed and golden brown, about 2 minutes per stick.
12 - Remove fried youtiao and drain on a wire rack or paper towels. Serve immediately while warm and crispy.