1/2cupunsalted butter, softened to room temperature
1/2cupgranulated sugar
1/2cuppacked brown sugar
1largeegg
1teaspoonpure vanilla extract
1/2cuphazelnuts, toasted and finely chopped
1/2cupchocolate hazelnut spread
as neededgranulated sugarfor rolling the cookie dough
Instructions
Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper to prevent sticking.
In a medium mixing bowl, whisk together the all-purpose flour, unsweetened cocoa powder, baking soda, and salt until well combined. Set this mixture aside.
In a large mixing bowl, use an electric mixer to cream together the softened unsalted butter, granulated sugar, and packed brown sugar until the mixture is light and fluffy, approximately 2-3 minutes.
Add in the large egg and the pure vanilla extract, beating until smoothly incorporated.
Gradually add the dry flour mixture to the butter mixture, stirring gently until just combined. Be cautious not to overmix; the dough should be thick and cohesive.
Carefully fold in the finely chopped toasted hazelnuts, ensuring they are evenly distributed throughout the dough.
Using your hands, scoop out small portions of the dough (about 1 inch in diameter) and roll them into balls. Coat each ball in granulated sugar before placing them on the prepared baking sheet, making sure to space them around 2 inches apart.
With your thumb or the back of a small spoon, create a gentle indent in the center of each dough ball.
Fill each thumbprint with approximately 1/2 teaspoon of the chocolate hazelnut spread.
Bake the cookies in the preheated oven for 10-12 minutes, or until the edges appear set and the tops show slight cracks. Once baked, let the cookies cool on the baking sheet for 5 minutes, then carefully transfer them to a wire rack to cool completely.
Notes
Arrange the cooled cookies on a decorative platter and drizzle with extra chocolate hazelnut spread for an elegant touch.