Preheat oven to 350 degrees Fahrenheit. Line an 8 x 8 baking dish with parchment paper, leaving on overhang on two sides to serve as handles to life brownies from pan, and set aside.
Melt ½ cup of dark chocolate chunks and coconut oil together in a glass bowl in the microwave for 1 minute, stirring every 20 seconds, until smooth.
Beat eggs and coconut sugar in bowl a stand mixer fitted with a whisk attachment, or in a large bowl with an electric hand mixer, for 5-7 minutes on medium high speed until pale and fluffy and tripled in volume.
While eggs and sugar are mixing, whisk together almond flour, cocoa powder and chocolate protein in a medium bowl and set aside.
Once egg and sugar mixture has tripled in volume, turn the mixer speed to low and drizzle in melted chocolate and continue to mix until fully incorporated.
Turn off mixer and fold flour mixture into egg mixture until just combined. Fold in other ½ cup chocolate chunks.
Pour batter into prepared baking pan and bake for 15-17 minutes until center is just set and a toothpick inserted in the center comes out with no wet batter. Allow brownies to cool for a few minutes in the pan, then remove brownies from pan using parchment handles, and transfer to a wire rack to finish cooling. Serve brownies warm or at room temperature.
Notes
Feel free to omit the protein powder if you like and use 1 cup of almond flour instead of ¾ cup!