Place the Flour into a mixing bowl and crumble the fresh yeast into the flour. If you are using dried yeast then just mix it into the flour and continue to stir in the sugar.
Make a well in the center of the dried ingredients and add in the vanilla extract, lemon extract, egg, molten butter and lukewarm milk.
Mix your ingredients and create a smooth dough by working it out shortly. Then pour some flour on top and place a cloth on that.
Keep the dough to rise for at least 1 hour or until it has increased double in size.
In the meanwhile prepare the Hazelnut paste. If you are using hard honey as I did in the picture, then add the honey to the milk and heat up the 2 ingredients until the honey melts. Otherwise just mix the honey to the milk.
Stir in the hazelnut flour.
Mix it all well and store it in a cool place until further use.
Check on your dough and see if it has risen double the size. The top should be cracked and when you press on it, it should be light and fluffy. You can see the difference between the dough before and after it has rested for an hour. The dough has grown in size!
Grease a pan with butter and preheat your oven to 350° Fahrenheit/180 Celcius.
Take your dough and work it out shortly for a minute. Form it into one large sausage and cut a fist sized piece.
Flatten dough and add about 1 ½ to 2 Tablespoons of the hazelnut paste into the center.
Enclose the filling with the dough.
Make sure that the filling can not be seen. The dough needs to enclose it properly without open seems.
Place your filled Buchteln rolls into the greased pan, closing face down. Keep some space between each because they grow in size when you bake them. Keep them to rest for another 20 minutes in a warm and dry place. They will rise a bit more.
Before baking them, spread some molten butter on top of each Buchtel bun. Bake them for about 20 to 25 minutes or until they get some color at 350° Fahrenheit/180 Celcius.
When done baking; add powdered sugar on top while they are still warm and serve them straight away with the warm Vanilla Sauce.