In a medium mixing bowl, stir together the almond flour, coconut flour, baking soda and salt. Set aside.
1 cup (100 grams) finely ground blanched almond flour, 5 tablespoons (40 grams) coconut flour, 1 teaspoon baking soda, 3/8 teaspoon salt
In a large mixing bowl with an electric hand mixer or using a stand mixer, beat together the fat, sunflower seed butter and sugar for about 1 minute.
6 tablespoons (84 grams) refined coconut oil, 6 tablespoons (98 grams) salted natural sunflower seed butter, 3/4 cup (150 grams) coconut sugar
Beat in the vanilla and egg or chia egg on low and mix until well incorporated. Stir in the lemon juice, if using, and then the flour mixture until well combined. Then stir in 1 cup (170 grams) chocolate chips (ignore the quantity below - it's a technical issue I can't fix). Wrap the dough in plastic wrap (I form a flat disc so it chills quicker) and chill for about 4 hours or until firm. If you're in a hurry, press into a very flat disc or two and freeze for about 30 minutes.
1 1/2 teaspoons vanilla extract, 1 large egg, 1/2 teaspoon lemon juice
Preheat the oven to 350 °F (175 °C) and line a baking sheet with a piece of parchment paper.
Roll the dough into 8 (75-gram) balls, press down very slightly, and place the remaining 1/4 cup (43 grams) of chocolate chips on the top (ignore the quantity below - it's a technical issue I can't fix) and on the sides of the dough balls. You can also roll them into smaller balls but then you need to adjust the baking time. Place 4" apart on the prepared baking sheet.
1 1/4 cups (213 grams) semi-sweet chocolate chips
Bake for 13-17 minutes or until the surface of the center of the cookies no longer appears wet. They'll be very soft but will continue to cook as they sit on the cookie sheet.
Let cool completely on the baking sheet. Store in an airtight container for up to 3 days. Don't be alarmed if there are green spots in the cookies – this could happen (see post for more details).