Grease a 9x9 pan, place a foil paper on top, and grease the foil paper as well. I just used Coconut Spray to grease.
On low heat, add coconut oil.
Once it starts to melt, add the chocolate chips.
Stir until melted, creamy and smooth. Turn off the stove.
Add the sugar. Mix well using an electric mixer so the batter is not grainy.
Add 1 egg at a time. Mix well.
Now add the cocoa powder and cornstarch. Mix, but do not over mix.
Add the walnuts. Gently stir.
This is what you should have.
Pour batter into foiled tray.
Into the oven for 30 minutes. Once done, notice the top will be grainy. Once cool, cut into 16 squares.
Notes
* For a crinkly top, you may try one or more of the following: use white sugar instead of turbinado brown sugar (perhaps the brown sugar is too grainy). beat the batter longer until it is smooth and thick.