Now take one pot with half filled water, keep other steel bowl on it. Bowl must enough big to set on above water level on that pot. keep this set up on mediums flame

Now in steel bowl add butter. Then mix powder sugar well.

Now in small bowl take milk powder add little melted butter and mix it well till smoth mixture.

Now add this mixture in butter sugar pot. Add half chocolate. It will start melting

Now add remaining chocolate. Mix well. Once it melt. Pour it in mold.keep it for set