Preheat the oven to 180C (160CFan) line a baking tray with baking parchment and leave to one side.
In a bowl cream together the butter and both sugars until pale in colour and fluffy.
Add in the egg and egg yolk, vanilla, flour, baking powder, bicarbonate of soda and corn flour and mix until completely combined and a dough begins to form.
Add in the chocolate chips and freeze-dried raspberries and mix until they are evenly distributed.
Weight your cookie dough into balls of around 100g. Flatten the cookie dough out in your hand and add a frozen ball of the cheesecake mixture to the centre.
Wrap the cookie dough around the frozen ball of cheesecake and make sure the cheesecake is completely sealed inside.
Spread the cookies between your baking trays. Remember the cookies will spread so make sure you leave enough room between them.
Bake in the oven for 13-15 minutes or until they start to go golden brown around the edges.
Remove from the oven and leave to cool. They will still be really soft when you take them out of the oven but they will firm up as they cool. I recommend leaving for 15-20 minutes before eating. Or leave them to cool completely.