Drain pears well in a sieve. For the icing, stir sour cream, 2 eggs, 50 g sugar and sauce powder until smooth. Cut the vanilla pod lengthwise and scrape out the pulp. Beat butter, 100 g sugar, vanilla pulp and salt with the whisk of the hand mixer until creamy.
Stir in 2 eggs one after the other. Mix flour, starch, baking powder, cinnamon, cocoa and gingerbread spice and stir in briefly. Pour the dough into a greased springform pan (24 cm Ø) and smooth it down evenly, pressing up one edge with your fingers.
Distribute the pears evenly in the mould. Pour water over them. Spread the cranberries over the cake by the spoonful. Bake in the preheated oven (electric range: 175 °C/ convection oven: 150 °C/ gas: level 2) for 40-50 minutes.
Remove and let it cool down on a cake rack.