Chocolate brownies - the 'healthy way'
50g dark chocolate (at least 70% cocoa solids)
50g gluten-free plain flour
15g Green & Black's cocoa powder
¼ tsp bicarbonate of soda
25g caster sugar
25g light brown sugar
½ tsp vanilla extract
1 tbsp skimmed milk
1 small egg
50g mayonnaise(!!)