Cream the butter and sugars

• Beat the softened butter with the brown sugar and caster sugar until pale and fluffy.
• Beat in the egg and vanilla extract until fully combined.

Make the cookie dough

• Mix in the plain flour, cornflour, baking soda and salt until a soft dough forms.
• Fold in the crushed Oreos and the chopped white chocolate.

Shape and stuff the cookies

• Divide the dough into equal balls.
• Flatten each ball, place a whole Oreo in the centre and wrap the dough around it to seal.
• Chill the stuffed dough balls in the fridge.

Bake

• Preheat the oven to 180 °C and line a baking tray.
• Space the dough balls well apart on the tray and bake until the edges are set but the centres are still soft.
• Let the cookies cool on the tray for a few minutes before moving them.