Add the hazelnuts, rolled oats, pecan nuts, and coconut flakes to the food processor and blend until it forms a coarse crumb.
Add the pitted dates, cacao powder, hemp seeds (set aside some for sprinkling later), and sea salt to the food processor. Blend until the mix gets sticky.
Line a 6×6-inch dish with plastic wrap. Add the dough to the dish. Press the dough down into all the corners and flatten it out, compressing it a little as you go.
Drizzle on the dark chocolate and sprinkle on the hemp seeds.