Add butter and Caster sugar. Beat until its pale and smooth
Add in egg, vanilla essence, ghee and condensed milk. Beat for 1-2 minutes
Add your milk powder and flour bit by bit. Until it becomes a dough. If you're using a handmixer, it can get tough to mix. So you might want to use your hand or a wooden stick.
Preheat oven for 150C for 30 minutes. While your oven is heating up, you may want to cut out your tart with the tart shaper/cutter.
Bake your empty tart at 150C for 15-20 minutes. Depending on your oven. While that's baking, fill up your piping bag with nutella.
When the tart is done. Pipe out your nutella onto your tart, it may melt due to the heat. (You might want to place your nutella in the fridge first)
Bake for another 15-20 minutes at 130C and extend another 5-10 minutes at 150C
