Mix 300 g flour and baking powder. Add 60 g sugar, 1 pinch of salt, 1 vanillin sugar, 125 g butter in pieces, egg and possibly 2-3 tbsp. ice-cold water. First knead everything with the dough hooks of the hand mixer, then briefly with your hands until smooth. Cover and chill for approx. 30 minutes.
Roughly chop the nuts. Bring cream, 200 g butter, 200 g sugar and 2 vanillin sugar to the boil. Stir in nuts and coconut, cool down for about 5 minutes
Grease the baking tray (approx. 35 x 40 cm). Dust the shortcrust pastry with a little flour and roll it out. Stir jam until smooth, spread on top. Spread the coconut mixture on top. Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for approx. 40 minutes. Cool down on the baking tray for about 20 minutes. Cut into squares (approx. 8 x 8 cm), then cut each one diagonally in half. Let cool off
Coarsely chop the chocolate coating and melt in a hot water bath. Dip nut corners with 2 tips each into the chocolate and let them dry