Add 1 tablespoon of hot water into the Milo powder and mix it in a bowl

Beat 1 egg

Add sugar into the egg

Whisk well.

Add all-purpose flour into the mixture

Mix well with a pair of chopsticks if you don't have a whisk

Add melted butter and mix well.

Grease the mold with butter and pour the cake batter into the mold

Steam it in a steamer with the highest heat for 8 minutes (the time depends on the size of your mold)

Done!