Preheat the oven to 180ºC (fan)/350ºF/Gas Mark 4.
Grease and line a deep square baking tray (20cm x 20cm).
In a large mixing bowl, combine thoroughly and set aside.
In a large mixing bowl, whisk together all ingredients until creamy and soft.
Spoon the wet ingredients into the bowl of dry ingredients and combine. You’ll probably need to use your hands to form into a soft dough.
Firmly and evenly press the dough into the lined baking tray.
Evenly press the frozen raspberries and white chocolate firmly into the mixture.
Place the tray in the oven for around 30 minutes. Check after 15 minutes and if it is browning too quickly then cover it with tin foil and place back in the oven.
Best served warm and gooey.