Steps

1. Crack 1 Egg into a bowl and whisk until broken.
   🕒 00:56
2. Add 50-60g Granulated Sugar to the whisked egg and mix well until the sugar granules are no longer gritty.
   🕒 01:09
3. Add 80ml Milk and stir briefly until combined.
   🕒 01:51
4. Add 3 tbsp Vegetable Oil all at once and mix until incorporated.
   🕒 02:06
5. Sift 120g All-Purpose Flour, 2 tbsp Cocoa Powder, and 1 tsp Baking Powder into the bowl with the liquid ingredients. Mix with a whisk until no dry flour is visible.
   🕒 02:37
6. Prepare a heatproof gratin dish that fits in your frying pan.
   🕒 03:37
7. Pour half of the batter into the prepared gratin dish and spread lightly with a rubber spatula.
   🕒 04:32
8. Break 1 Bar Chocolate into pieces and arrange them on top of the batter.
   🕒 05:00
9. Pour the remaining batter over the chocolate and gently tap the gratin dish on the counter to remove air bubbles and even out the batter. [Tap gently to achieve a fine, smooth texture!]
   🕒 05:19
10. Add water to the frying pan to about one-third the height of the gratin dish and bring to a boil.
    🕒 05:47
11. Once the water is boiling, reduce heat to low, cover the frying pan with a lid, and steam.
    🕒 06:22
12. Once steamed, carefully remove the gratin dish using oven mitts or a spatula (beware of steam burns).
    🕒 06:59
13. Once slightly cooled, remove the steamed cake from the gratin dish.
    🕒 07:19
14. Cut the steamed cake into your desired pieces.
    🕒 07:47
15. Serve on a plate and sprinkle with Powdered Sugar if desired. Ready to enjoy!
    🕒 08:08