Warm the milk lukewarm. Crumble yeast into it and dissolve while stirring. Put flour, sugar, 1 pinch of salt and egg in a bowl. Add yeast milk. Stir in with the dough hooks of the mixer, kneading butter in flakes until the dough is smooth.
If it forms a ball, continue kneading for about 3 minutes. Cover and leave to rise in a warm place for about 40 minutes until its volume has doubled.
Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer). Melt butter. Mix sugar and cinnamon. Chop hazelnuts. Knead dough on some flour briefly. Roll out rectangularly (approx. 40 x 50 cm).
Spread the dough with approx. 3 tbsp. butter, spread approx. 75 g nuts on top. Roughly grate marzipan over it. Sprinkle with cinnamon sugar, up to 2 tbsp. Press everything a little bit. Fold the long side of the dough plate halfway, press it lightly.
Cut into about 12 strips (each about 20 cm long).
First turn each strip into a cord and then wrap it into a knot. Place on a baking tray lined with baking paper.
Spread the rest of the butter on the knots, sprinkle with the remaining nuts and cinnamon sugar. Cover and leave to rise for about 10 minutes. Bake in a hot oven for 12-14 minutes. Take out and let cool down.