In a large mixing bowl, whisk egg, egg whites and coconut oil until bubbly.
Add in dry ingredients. With mixer, mix the batter until everything is well combined. The dough starts to form. At this point, it is very sticky.
Add in yeast mixture. Continue to mix until yeast mixture is incorporated.
While mixing, add in warm water gradually. Continue to whisk in medium low speed until you see the dough become sticky and solid. You should be seeing the dough stretchy. This is the consistency you are looking for. It takes a few minutes to mix until the dough is sticky and stretchy.
Cover the mixing bowl with cling wrap.
Rest the dough (30mins)
Rest the dough in dark area for 0.5hour. It will expand to 1.5x of its original size.
Proofing buns (45mins)
Preheat oven to 100°C (212°F). Then turn off the heat and keep the door close to create a warm environment.
. Split the dough into 9 equal portions. (~91g-94g each) Start making the buns using wet palms.
Cover the buns with a piece of cloth.
. Proof the buns inside the preheated oven. Keep a bowl of hot water inside the oven. This will create a warm and moist environment for the yeast to thrive. Ensure you have turn off the oven heat and leave the dough inside for 45mins.
Baking (25mins)1. Preheat oven to 2Baking (25mins)1. Preheat oven to 200°C (392°F).
When baking, reduce the heat and bake at 180°C (356°F) for 25mins.
Cover them up with aluminium foil when the buns start browning.
. Spread some unsalted butter on the surface before while the buns are still hot.3. The key success here is to carefully control the water. Do not add excessive water.