Preheat the oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer) and place paper baking cups in the recesses of a muffin tray (12 recesses).
For the cupcakes, beat butter, sugar, 1 pinch of salt and orange zest with the whisks of the mixer for about 5 minutes until frothy. First add the eggs one by one, then the crème fraiche. Mix almonds, flour, speculoos spice and baking powder and stir briefly into the butter-egg-cream.
Spread the dough into the moulds. Bake in a hot oven for about 25 minutes. Let them cool down.
For the Frosting, whisk butter, icing sugar and vanilla pulp with the whisk of the mixer for approx. 5 minutes until thick and creamy. Stir in yoghurt by the spoonful.
Remove the paper cups from the cupcakes and straighten the surface. Turn over and place on the cut surfaces. Crumble the cake sections and mix with 3-4 tablespoons of Frosting. Spread conically on the cupcake bases.
Pour the rest of the Frosting into a piping bag with a perforated nozzle (8-10 mm) and spray small tips onto the crumb cones. Chill for at least 30 minutes.