Preheat the oven

• Preheat the oven to 180 °C.

Cream butter and sugars

• Beat the softened butter with the brown sugar and granulated sugar until light and creamy.
• Beat in the egg and vanilla extract until smooth.

Make the cookie dough

• Whisk together the flour, baking soda and salt, then fold into the wet mixture until just combined.
• Fold in the chopped Oreos and the white chocolate chunks.

Fill the skillet

• Spread the dough evenly in a greased skillet.
• Scatter the reserved chopped Oreos over the top.

Bake

• Bake until the edges are set and the center is still slightly soft.

Serve

• Let the skillet cool slightly and serve warm, ideally with ice cream.