Recipe then my request for help follows:
150g - Light Brown Sugar
200g - Unsalted Butter
100g - Dark Chocolate
175g - Plain Flour
50g - Cocoa Powder
2tsp - Baking Powder
1tsp - Bicarbonate of Soda
1/2tsp - Salt
4 - Eggs
2tbsp - Soured Cream
2 20cm tins lined and greased.
Preheat oven to 175...