Whip butter, sugar, cinnamon, ginger and salt with the whisk of the hand mixer until creamy white. Stir in the eggs one after the other. Mix flour and baking powder, add in portions and stir in. While stirring constantly, allow buttermilk to run in. Stir in cranberries and 75 g rock candy. Pour the dough into a greased, flour-spread box form (approx. 2 litres capacity, 30 cm long). Sprinkle the remaining rock candy on the dough
Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 60-70 minutes. If necessary, cover the cake with aluminium foil after about 40 minutes of baking time. Remove, place on a cake rack and let it cool down for about 30 minutes. Carefully turn out of the tin. Let it cool down on the grid
waiting time approx. 1 1/2 hours