Prep the pan and oven: Heat the oven to 375°F (190°C). Lightly grease a 12-cup muffin pan or line with paper liners.
Mix dry ingredients: In a large bowl, whisk the flour, baking powder, baking soda, and salt.
Add lemon zest and rub it into the flour with your fingers to release the oils.
Whisk wet ingredients: In a separate bowl or large measuring cup, whisk the maple syrup, yogurt, olive oil, eggs, lemon juice, and vanilla until smooth.
Combine: Pour the wet mixture into the dry. Stir gently with a spatula just until no dry spots remain. The batter should be thick but scoopable.
Do not overmix.
Fold in blueberries: Toss blueberries with 1 tablespoon flour, then fold them into the batter with a few gentle strokes.
Fill the cups: Divide the batter evenly among the muffin cups, filling each about 3/4 full. Sprinkle tops with turbinado sugar if using.
Bake: Bake 16–20 minutes, or until the tops are set and a toothpick comes out with a few moist crumbs.
Cool: Let muffins cool in the pan for 5 minutes, then transfer to a wire rack. Cool at least 10 more minutes before eating.