How To Make Nutella and Biscoff Cookies

Edited By Leah,

Ingredients
14 tablespoons Nutella, (heaped)
115 g butter,
175 g light brown sugar,
1 teaspoon vanilla,
1 medium egg,
275 g plain flour,
1/2 teaspoon bicarbonate of soda,
1 tablespoon cornflour,
200 g finely chopped chocolate (optional)