Ingredients

• 100 grams skinned walnuts
• 400 grams milk chocolate
• 230 grams cold butter
• 160 grams caster sugar
• 160 grams soft light brown sugar
• 200 grams self-raising flour
• 300 grams plain flour
• 4 teaspoons salt
• 1/4 teaspoon bicarbonate of soda
• 2 teaspoons baking powder
• 2 large eggs