In a large bowl, combine: flour, flaxseed, chia seeds, baking powder, salt
Add (in order): plant milk, orange juice, vanilla, sweetener (if using), orange zest
Mix gently until just combined.
Let the batter rest for 5–10 minutes to hydrate. The batter should be thick but pourable—it should lightly coat the back of a spoon, but still slowly drip off. If it is too thick, add water about 1 tablespoon at a time.
Cook on a lightly greased pan over medium heat until bubbles form, then flip and cook until golden.
Store any extra batter in a jar and freeze for up to a year, or keep refrigerated for about3-5 days.