To make siopao dough for the Filipino recipe, gather the required ingredients, which include: 260 millileters of warm milk at around 40 to 60 degrees, 2 teaspoons of dry instant yeast, 2 tablespoons of sugar and 1/2 teaspoon of salt. Additionally, make sure to have 500 grams of all-purpose flour, 2 teaspoons of baking powder, 100 grams of sugar and 2 tablespoons of vegetable oil in addition to a lime.
To make the dough, mix together the milk, yeast, 2 tablespoons of sugar and salt. Combine the ingredients until they are fully dissolved, and leave the mixture alone for about 5 to 10 minutes or until the mixture has a foamy consistency. In a separate bowl, proceed to combine the flour, 100 grams of sugar, baking powder and vegetable oil, and then add a few drops of lime juice after mixing the ingredients. The lime juice causes the dough to whiten.
Combine the yeast with the flour mixture until it forms into a doughy consistency, and continue to knead the dough until it doesn't feel sticky. Place a plastic film on the dough, and let it rise in a warm area for about a 2 hour duration, or until the dough doubles in size. Place the dough on a clean work surface, and form it into a log shape. Cut the dough into 10 equal parts, and roll each piece into a ball. After covering the dough with a damp cloth, allow the dough to rise for the next half-hour, and form the siopao accordingly.