Pre-heat your oven to 350 °F. Spray 12 muffin cups with cooking spray or line them with silicone muffin liners. In a small bowl, xix together the ground flaxseed and water and set aside to thicken.
Prepare your chocolate bar by chopping it into chunks. You'll be melting half of the pieces and stirring in the remaining half towards the end of the preparation.
In a larger bowl, whisk together the flour and cocoa powder until smooth.
In a small sauce pan over low heat, melt the coconut oil. Once the coconut oil is melted, turn off the heat and add in ½ of the chocolate bar chunks. Stir until fully combined and smooth. Add the coconut sugar and vanilla extract to the oil and chocolate mixture and stir to combine.
Add the chocolate liquid into the flour and cocoa mixture, as well as the 2 flax eggs. Stir until just combined.
Fold in the remaining ½ of the chocolate bar chunks and the toasted coconut.
Add 2 tablespoon of batter to each muffin cup.
Bake for about 10-12 minutes, checking often towards the end of cooking as baking times may vary.
Allow the brownies to cool completely before removing from the pan and serving.