Prep: Preheat your oven to 350°F and line an 8x8-inch pan with parchment paper.
Emulsify: In a large bowl, whisk the softened coconut oil and coconut sugar until smooth and combined, glossy like caramel almost.
Bind: Whisk in the egg and the extra yolk until the mixture is glossy.
Mix: Fold in the almond flour and tapioca flour until a thick dough forms and no dry spots remain.
Fold: Stir in the chocolate chunks (save a few to press into the top if you want that "pro" look).
Bake: Spread the batter evenly into the pan. Bake for 20–25 minutes until the edges are golden but the center still has a slight softness.
Set: Let them cool completely in the pan before slicing. This is crucial for the perfect "measured" texture.