Preheat oven to 365 °F (185 °C), make sure the oven is hot before you put in the brownies in.
Combine grated sweet potato, eggs, vanilla, honey and olive oil in a large mixing bowl and stir together until well incorporated. Then add baking powder and baking soda and stir. Add cocoa powder, mix and finally add coconut flour. Avoid adding too much coconut flour as it will absorb too much moisture which will result in drier brownies.
After stirring everything together, pour the mixture into a baking tray greased with a little olive oil. Karen used a square tin in which the thickness of the layer came to 1 inch tall. That’s about what you’re after for the best results. Too thin and the brownies might overcook and too tall will result in undercooked middle.
Cook for 25-30 minutes. Remove the tin and cool for 5-10 minutes before carefully removing the brownie cake form the tin. You can cut it in quarters and remove one part at a time if the bottom stick a little. Leave the brownie cake to cool down before cutting.
Finally, melt some dark chocolate in a bowl over boiling water or in a microwave. Use a spatula to drizzle and spread melted chocolate over the top. Slice into individual serving squares. You can also top them with raspberries or strawberries.