photo courtesy of Bridget at Bake at 350
taken from Bridget at Bake at 350 who slightly modified it from the magnificent Baked Explorations
about 1 cup hazelnuts
2 cups unbleached all-purpose flour
1/4 cup sugar
1/4 cup dutch-process cocoa powder (such as Hershey's Special Dark)
1 TBSP baking powder
1/2 tsp. coarse salt
6 tablespoons cold unsalted butter, cut into chunks
1 large egg
1/2 cup heavy cream
1/2 cup Nutella, divided
Preheat oven to 350. Place the hazelnuts on a cookie sheet and bake for 15 minutes, or until the papery skins begin to crack and loosen. Rub the hazelnuts with a dish towel to remove most of the skin. Let cool. Coarsely chop and set aside.
Increase the oven temp. to 375 and place the rack in the center. Line a baking sheet with parchment paper.
In a large bowl, whisk the flour, sugar, cocoa powder, baking powder, and salt until combined. Add the butter. Use a pastry cutter (or your fingers) to cut the butter into the mixture until the butter is pea size and the mixture is coarse.
In a separate bowl, whisk together the egg and cream. Pour the wet ingredients into the dry ingredients and stir until the dough just comes together. Gently and briefly knead the dough with your hands. Add the 3/4 cup toasted hazelnuts and knead gently to incorporate.
Dump the dough onto a lightly floured surface. Flatten the dough into a rectangle approximately 6 by 12" (it does not need to be precise) and spread 1/4 cup of the Nutella on top. Roll the dough up and make a cylinder about 6 inches long, turn it on its end, and gently flatten it into a disk about 1 and 3/4 inches high. Do not overwork the dough.
Use a bench scraper to cut the dough into 8 wedges and place them on the prepared baking sheet, about 2 inches apart. Bake the scones for 18 to 20 minutes, rotating the baking sheet halfway through, or until a toothpick inserted into the center of a scone comes out clean.
Transfer the scones to a wire rack to cool completely. Place the baking sheet with the parchment still underneath the rack.
For the topping:
Heat the remaining 1/4 cup Nutella (or add a little more) in a microwave until pourable, about 10-20 seconds on high. Transfer the Nutella to a pastry bag, cut off the tip and drip the warm Nutella in a zigzag pattern over the tops of the scones. The scones are best eaten the day they are made.