Wash and drain the blackberries. Peel pears, remove core. Cut the pears into pieces. Mix with lemon juice and put aside. Peel ginger and chop finely
Mix flour and baking powder. Cream butter and sugar with the whisk of the hand mixer. Stir in the eggs little by little. Fold in the flour mixture first, then the pears and ginger. Pour the dough into a greased springform pan (20 cm Ø), dust with flour and smooth it down. Spread the blackberries on the dough and press them slightly into the dough
Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for 50-60 minutes. Let the cake cool down, place on a cake plate and dust with icing sugar
Preparation time approx. 1 1/4 hours