Chop the chocolate coating. Cut butter into pieces. Melt the chocolate coating and butter in a large pot at low heat
Roughly chop the nuts. Wash the blackberries and drain well in a sieve. Beat the eggs, sugar and salt in a large mixing bowl with the whisk of the hand mixer for approx. 3 minutes until creamy. Remove the chocolate and butter mixture from the heat, pour into the egg mixture and stir in. Mix flour and baking powder. Quickly fold into the chocolate-egg mixture. Finally mix 200 g chopped nuts into the dough
Pour the dough into the greased fat pan of the oven (34 x 39 cm). Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for 30-35 minutes. After about 10 minutes, carefully remove the pan from the oven. Spread blackberries and remaining nuts on top and bake until done
Remove blondie and let her cool down on a cake rack. Cut Blondie into pieces (approx. 5 x 7 cm)
Preparation time 50-55 minutes