Prepare the muffin tin: Preheat the oven to 375°F (190°C). Line a 12-cup muffin tin with paper liners.
Mix the dry ingredients: In a medium bowl, whisk together the flour, baking powder, baking soda, and salt.
Mix the wet ingredients: In a large bowl, whisk the sugar, eggs, oil, yogurt, vanilla, lemon juice, and lemon zest until smooth and well combined.
Make the batter: Add the dry ingredients to the wet mixture. Fold gently with a spatula until almost combined. Do not overmix.
Add blueberries and bake: Toss the blueberries with 1 tablespoon of flour, then gently fold them into the batter. Divide the batter evenly between the muffin cups, sprinkle with coarse sugar if desired, and bake for 18–22 minutes.
Cool and serve: Let the muffins cool in the pan for 5 minutes, then transfer them to a wire rack. Serve warm or at room temperature.