01 -
Preheat oven to 350°F (175°C). Spread hazelnuts on a baking sheet and toast for 10-12 minutes, stirring halfway through. Allow to cool, then roughly chop. Reserve ½ cup of chopped hazelnuts for topping later.
02 -
In a medium bowl, whisk together flour, cocoa powder, baking powder, and salt. In a large bowl, cream butter with granulated and brown sugars until light and fluffy (2-3 minutes). Add egg and vanilla extract, mixing until smooth. Gradually incorporate dry ingredients into wet ingredients until fully combined. Fold in the toasted hazelnuts.
03 -
Line a baking sheet with parchment paper or silicone mat. Scoop tablespoon-sized portions of dough, roll into balls, then gently flatten into discs. Bake in preheated oven for 10-12 minutes, until edges are set. Cool completely on a wire rack.
04 -
In a microwave-safe bowl, melt chopped chocolate and coconut oil (if using) in 30-second intervals, stirring between each until smooth. Dip each cooled cookie fully into the melted chocolate. Place on wire rack or parchment paper. While chocolate is still wet, sprinkle with reserved chopped hazelnuts. Allow chocolate to set completely at room temperature or refrigerate to expedite.