Sift the flour into a large bowl, add the baking powder, salt, and vanilla sugar, then mix well to combine.
Cut the cold butter into small cubes and add it to the flour. Using your fingertips or a pastry blender, quickly rub the butter into the flour until the mixture resembles coarse crumbs.
Slightly warm the honey to make it more liquid, then add the powdered sugar and the egg. Mix thoroughly until well combined.
Chop the dark chocolate into small pieces, then add it to the flour mixture and stir to distribute evenly throughout the dough.
Add the honey-egg mixture and the sour cream to the flour-chocolate mixture, then quickly knead the dough together until just combined. Be careful not to overmix.
Wrap the dough in plastic wrap and chill in the refrigerator for at least 30 minutes to allow the flavors to meld.
On a lightly floured surface, roll out the chilled dough to a thickness of about 1.5 cm (approximately 1/2 inch). Use a round cookie cutter to cut out the scones.
Place the scones on a baking sheet lined with parchment paper. Bake in a preheated oven at 350°F (180°C) for 12-15 minutes, or until golden brown.
Let them cool slightly before dusting with powdered sugar or drizzling with melted chocolate. Enjoy fresh and warm!
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