Whisk batter mixture:
Combine almond milk, cornstarch, ground flaxseed, maple syrup, cinnamon, and vanilla extract in a shallow dish and whisk thoroughly. Allow the mixture to rest for 5 minutes so it can thicken.Melt fat in skillet:
Heat a small amount of coconut oil or vegan butter in a skillet over low heat until melted.Coat bread slices:
Submerge one side of a bread slice into the batter, then flip and coat the other side. (Refer to notes regarding bread consistency.)Cook until golden:
Transfer the coated bread directly to the preheated, greased pan. Cook over medium heat, flipping once, until each side is golden brown and crisp, roughly 3-4 minutes per side.