Chocolate Muffin Pudding

INGREDIENTS
dark chocolate (100g)
butter (115g)
plain flour (275g)
1 tsp of bicarbonate of soda
soft brown sugar (200g)
1 egg
low-fat natural yoghurt (100g)
1/2 tsp of vanilla extract
milk (150ml)
handful of dark chocolate chips
few squares of white chocolate
red and green coloured fondant icing