01 -
Heat your oven to 350°F (175°C). Scatter the hazelnuts on a tray and bake for around 10–12 minutes, flipping them halfway. Let them cool, then chop roughly. Save ½ cup of these chopped nuts to sprinkle as a topping.
02 -
In a large bowl, cream together the softened butter with the white and brown sugars, beating for 2–3 minutes until fluffy. Mix in the egg and vanilla until smooth. In another bowl, stir together the flour, cocoa, baking powder, and salt. Slowly combine the dry mix with the wet ingredients, stirring until well blended. Gently fold in the hazelnuts.
03 -
Prepare a baking tray by lining it with either silicone baking mat or parchment paper. Scoop tablespoon-sized portions of dough, then roll into balls and slightly flatten them into discs. Bake in the oven for 10–12 minutes, until the edges are set. Cool fully on a wire rack before moving to the next step.
04 -
Melt the chopped chocolate and coconut oil (if you're using it) in a microwave-safe bowl in short 30-second bursts, stirring between intervals to make it smooth. Dip cooled cookies in the melted chocolate, covering them entirely. Place on parchment paper or a cooling rack. While the chocolate is wet, sprinkle the reserved hazelnuts over the top. Let the chocolate harden completely, either at room temperature or chilled in the fridge for a faster result.