BUCHTELN - BAKED DONUTS WITH JAM

I first heard about this recipe from my aunt who's Macedonian, but lives in Croatia for a long time. She made these baked donuts (as we call them) one morning while everyone was asleep. I was a kid back then. You can't imagine the smell that came out from the kitchen and woke up all of us. Amazing smell of sweet and baked. The pan was gone in 10 minutes.
These are basically donuts filled with jam and are best eaten while warm.

Ingredients:

Yeast preparation:

• 100 ml warm milk
• 1/2 fresh yeast
• 1 large spoon sugar
• a little flour 

For the dough:

• 1/2 kg flour 
• 100 g sugar
• 100 g *melted butter
• 150-200 ml warm milk
• 1 egg
• 1 sachet vanilla sugar
• a little lemon crust
• a pinch of salt

Preparation:

1. Add sugar, yeast and flour into the warm milk. Let it rise.
2. Warm up the milk. Heat the butter to melt slightly. Add beaten egg to the warm milk and stir. 
3. Place the flour in a larger bowl, add sugar, salt, lemon crust, vanilla sugar, raised yeast, milk with egg and dissolved butter.
4. Mix with the mixer until you get a ball that separates from the walls of the bowl.
   Cover the dough with a clean cloth and let it rise on a warm place until it doubles the volume.
5. When it is doubled, knead it a little and form a larger crust. Cut the crust in 16 pieces and add a spoon of jam or nutella in the middle of each piece. Then close it again in a form of a ball and place in the pan (size 32) aligned with baking paper (add a little oil on the baking paper) with the damp part placed at the bottom.
   Leave them to rise again in the heat.
6. Before baking, coat donuts with melted butter and sprinkle some sugar on top, so they'll turn crusty after baking.
7. Put the risen donuts in a cold oven that you turn on at 160°C to bake for 30 minutes, depending on your oven or until they get a beautiful golden color.
8. Sprinkle powdered sugar on top after baking.