3. Step
Reserve 2 tablespoons of the seed mixture in a small bowl; transfer the remaining seeds to a large bowl. Add almond flour, coconut flour, baking powder, baking soda and salt to the large bowl; whisk to combine. Whisk eggs, buttermilk, oil, chia seeds and maple syrup (if using) in a medium bowl. Stir the wet ingredients into the dry ingredients until combined. Scrape the batter into the prepared pan. Sprinkle with the reserved seeds, pressing them gently into the batter to help them adhere. Let stand for 10 minutes.