large egg, lightly beaten
Preheat oven to 350. Beat Nutella and sugar in a large bowl until well blended. Add egg and baking soda and beat until well combined.
Roll teaspoons of dough into balls and arrange 1 inch apart on cookie sheet. These cookies do spread so that is important.
Flatten balls with tines of fork in a criss cross pattern. Bake until puffed and golden, about 8-10 minutes. Cool on cookie shett for 2 minutes then transfer to cooling rack.