Preheat your oven to 375°F (190°C) and line a 12-cup muffin tin with paper liners or lightly grease with oil.
In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt.
In a separate bowl, combine the plant milk, melted coconut oil, apple cider vinegar, vanilla extract, and lemon zest.
Let the wet mixture sit for 5 minutes to allow the milk to curdle slightly, creating a vegan buttermilk.
Pour the wet ingredients into the dry ingredients and stir gently until just combined - a few lumps are perfectly fine.
Toss the blueberries with 1 teaspoon of flour to prevent sinking, then gently fold them into the batter.
Spoon the batter into the prepared muffin cups, filling each about 3/4 full.
Sprinkle the tops with turbinado sugar for a delightful crunch.
Bake for 22-25 minutes until golden brown and a toothpick inserted in the center comes out clean.
Let cool in the tin for 5 minutes before transferring to a wire rack to cool completely.