Grease a 9x14 rectangular baking tray and line with baking parchment
Preheat the oven to 180C, fan oven 160C, Gas Mark 4
Place the butter and sugar into a bowl and cream together until light and fluffy
Add the vanilla essence and then mix in the eggs one at a time, adding another when the first is fully mixed in.
Mix the flour and baking powder and add gradually to the bowl mixing until combined.
Add the milk and mix.
Add the mixture into the baking tray and spread evenly.
Scatter over the berries and the granola
Place in the oven for 40 minutes until it is golden brown and a skewer inserted into the centre comes out clean.
Allow to cool