Preheat the oven

• Preheat the oven to 175 °C.
• Lightly grease the pie dish.

Make the cookie dough

• Whisk the melted butter with the brown sugar and granulated sugar until smooth.
• Beat in the egg, egg yolk and vanilla extract.

Add the dry ingredients

• Stir in the flour, baking soda and salt until just combined.
• Fold in the chocolate chips.

Assemble the pie

• Press half of the cookie dough into the bottom of the pie dish.
• Spread the warmed Nutella over the dough, leaving a small border.
• Cover with the remaining dough and seal the edges.

Bake

• Bake until the edges are golden and the center is still slightly gooey.

Cool and serve

• Let the pie cool slightly in the dish.
• Serve warm with a spoon so it stays scoopable.