Grease a springform pan (20 cm Ø) for the dough. Preheat the oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer). Wash lemon hot and dab dry. Finely grate the peel. Squeeze lemon.
Cream 125 g soft butter, cream cheese, lemon zest, vanilla pulp, sugar and 1 pinch of salt with the whisks of the mixer. Stir in the eggs one by one. Mix flour and baking powder. Stir 2 tablespoons lemon juice into the sugar-egg mixture.
Smooth the dough in the form. Bake in a hot oven for 45-50 minutes. Remove from the oven. Let it cool down.
For the filling, soak gelatine in cold water. Heat 50 g cream. Dissolve chai powder and squeezed gelatine in it. Stir in 100 g caramel spread. Remove from the heat and let it cool down for about 15 minutes.
Whip 400 g cream until stiff. First stir about 3 tbsp. of cream into the caramel cream. Then fold the caramel cream into the remaining cream. Chop the chocolate coffee beans. Fold into the cream.
Remove the cake from the mould. Cut through horizontally twice. Spread the bottom base with 1⁄3 cream. Drizzle 1 tablespoon caramel spread over it. Place the second cake base on top, also spread the cream and spread on top.
Cover with the cake lid and press down lightly. Add the rest of the cream. Chill for about 1 hour. Decorate with caramel lattice and beans or gold powder as desired shortly before serving.