Mix all the dry ingredients together: almond flour, tapioca flour, baking powder, baking soda, salt, and coconut sugar.
Add sustainable palm shortening. Using your fingers, break up the shortening into the flour mix. Keep breaking up the shortening until pieces are no larger than the size of a pea.
Add the eggs, nut milk, and apple cider vinegar. Stir until just combined.
Drop 8 equal chunks of biscuit batter onto a baking sheet. Lightly brush the tops with nut milk. (Or for a deeper color, lightly brush beaten egg yolk on the tops.)
Place baking sheet in the refrigerator for 20 minutes. Preheat oven to 350°F.
Bake for 18 minutes. Remove from oven and let cool for a few minutes.
Transfer biscuits to a rack to finish cooling. Serve warm or after they have completely cooled.
Biscuits are best when eaten soon after baking or within the day. If you need to store leftovers, wrap in foil, plastic wrap, or place in a ziplock bag. Keep at room temperature for 1 day or in the refrigerator for up to 1 week. Alternatively, wrap in foil and store in the freezer for up to 2 months.