pre heat oven to 150c, grease a baking tin ( I use grease proof paper)

melt 200g of white chocolate and all the butter in a bowl

beat eggs and sugar together

break the reast of your chocolate into separate squares

once chocolate is melted take off the heat and add the sugar and egg mix

once mixed add flour and baking powder

add chocolate to mixture

pour in baking tray

put in oven for 20-25 minutes

cut in to squares once cool