Step 1: Preheat the Oven
Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.

Step 2: Mix Dry Ingredients
In a mixing bowl, whisk together almond flour, coconut flour, chia seeds, baking soda, and salt.

Step 3: Combine Wet Ingredients
In a separate bowl, whisk together the egg (or flax egg), melted coconut oil, maple syrup, lemon juice, lemon zest, and vanilla extract.

Step 4: Combine Wet and Dry
Add the wet ingredients into the dry mixture and stir until fully combined. The batter should be slightly thick and sticky. Let it rest for 5 minutes so the chia seeds can absorb some moisture.

Step 5: Form Cookies
Use a spoon or cookie scoop to form 1.5-inch rounds and place them on your prepared baking sheet. Flatten gently with the back of a spoon.

Step 6: Bake
Bake for 10–12 minutes or until the edges begin to turn golden. Let cookies cool on the tray for 5 minutes before transferring to a wire rack.

Step 7: Serve or Store
Enjoy fresh or store for later use. These cookies taste even better the next day as the flavors meld together.