Make the vegan buttermilk: In a small bowl, gently stir together the nondairy milk and apple cider vinegar. Set aside for at least 5 minutes, until the mixture looks slightly thickened and lightly separated (it's normal to see small lumps here!)
Whisk the dry ingredients: In a large mixing bowl, whisk together flour, baking powder, and salt.
Add the wet ingredients: Pour the maple syrup, vanilla extract, and vegan buttermilk into the bowl with the dry ingredients. Stir until just combined, do not overmix! (The batter does not need to be perfectly smooth, a few lumps are okay!)
Cook the pancakes: Heat a nonstick pan over medium-low heat. If desired, lightly spray the pan with just a bit of oil for more golden brown pancakes (optional, as long as you are using a good nonstick pan! Without the oil your pancakes will still cook through, they just won't develop the same golden brown color).Pour about ⅓ cup of pancake batter onto the pan for each pancake. Cook for 2-3 minutes, until bubbles form on the surface and the edges begin to look set. Flip and cook another 1-2 minutes, until the pancakes are cooked through (and golden brown, if using oil).Repeat with the remaining batter. Serve pancakes with maple syrup, fresh fruit, or your favorite toppings!