Mix yeast, sugar, and water in a cup, put aside.

Mix plain flour and baking powder, gradually pour yeast water, knead the dough until it doesnt stick.

Add margarine, knead properly until smooth.

Cover the dough with plastic wrap for 45 mins until it expands to double its size.

Knead it again less than a minute, make 10 balls out of it, fill each balls with nutella. Rest them for 15 mins.

Pre-heat water in a steamer, steam the balls while the water boiling. Steam them for 8-10 mins.

The white buns with chocolate is ready to enjoy.