Preheat: Preheat your oven to 350°F (175°C) and grease an 8-inch round cake pan.
Melt: Melt the dark chocolate and coconut oil together until smooth. Let it cool slightly.
Whisk: In a large bowl, whisk the eggs and maple syrup until well combined.
Fold: Slowly pour the melted chocolate into the egg mixture while whisking constantly. Sift in the cocoa powder and salt, then gently fold until smooth.
Bake: Pour into the pan and bake for 25-30 minutes until the edges are set.
Cool: Allow the cake to cool completely in the pan before removing. Dust with cocoa powder and serve with fresh berries.