Preheat oven to 350ºF and lightly grease a 9-inch bundt pan with coconut oil. My pan has a 6-cup capacity. You could also use a 9-inch cake pan (I recommend one with high sides, or use a springform pan).
In a large mixing bowl, combine the almond flour, coconut sugar, tapioca flour, coconut flour, baking powder, and salt. Whisk thoroughly. Form a well in the center of the dry ingredients.
2¼ cups (220g) blanched almond flour, ⅔ cup coconut sugar, ½ cup (57g) tapioca flour, ⅓ cup (43g) coconut flour, 1 tablespoon baking powder, 1 teaspoon sea salt
In a separate bowl, whisk together the lemon juice, lemon zest, dairy-free milk, coconut oil, maple syrup, flax egg, and vanilla extract.
⅓ cup freshly squeezed lemon juice, ⅔ cup non-dairy milk, ¼ cup (50g) refined coconut oil, ¼ cup (84g) pure maple syrup, 1 flax egg, 2 teaspoons vanilla extract
Pour the liquid ingredients over the dry ingredients and whisk until smooth. You’ll have a thick batter. Pour into the prepared pan and spread the batter evenly.
Bake for about 40 minutes, or until the toothpick inserted comes out clean and the cake springs back when pressed with a fingertip.
Let cool completely before removing it from the pan and glazing.