In a large bowl, beat the butter and sugars until light and fluffy. Add vanilla and eggs, one at a time, and beat well until combined.
Place flour and baking soda into a bowl; mix to combine then add to the butter mixture.
Scoop a heaped tablespoonful of dough and flatten it into the palm of your hand. Add in some Nutella into the middle, about 1 tsp. Fold cookie dough back up so that it covers the Nutella; seal closed.
Bake for about 10-12 minutes or until edges are golden brown. Remove from the oven and let cool for 5 minutes before moving cookies to a wire rack to cool completely.
Recipe by Kiku Corner at https://www.kikucorner.com/2015/05/20/nutella-stuffed-cookies/