Preheat the oven to 325 °F (167 °C) and line a muffin pan with 12 liners.
Place the egg whites in a medium glass or stainless steel mixing bowl and the egg yolks in a large mixing bowl (glass or plastic is fine). If you don't have a glass or stainless steel bowl for the egg whites, make sure your plastic mixing bowl is super clean and free of any oil residue as this can interfere with beating the egg whites.
4 large eggs
Beat the egg whites and 2 1/2 tablespoons (31 grams) coconut sugar (ignore the quantity below - it's a technical issue I can't fix) at high speed until stiff peaks form (about 30-60 seconds). Keep the beaters in the mixer.
1/2 cup (100 grams) coconut sugar
In the bowl with the egg yolks, add the remaining 69 grams coconut sugar, water and extract. Beat for about 30-90 seconds at high speed or until thickened and lighter in color. Mix in the salt and then use a silicone spatula to fold in the almond flour.
3 1/2 teaspoons water, 1 1/4 teaspoons vanilla, 1 cup + 9 1/2 tablespoons (160 grams) finely ground blanched almond flour, 1/8 teaspoon salt
Fold in the egg white mixture to the egg yolk mixture just until combined. Do not over mix but make sure it's thoroughly combined.
Stir in the chocolate chips. Fill each liner almost all the way full and then sprinkle a few mini chocolate chips on top, if desired.
1/2 cup (85 grams) semi-sweet chocolate chips
Bake for 18-23 minutes or until a toothpick inserted in the center comes out clean and the tops of the muffins no longer appear wet.
Immediately remove the muffins from the pan and cool completely on a wire rack. Let sit for 2 hours before serving for best taste and texture.
Cover and store at room temperature.