01 - Heat oven to 375°F. Line a 12-cup muffin tin with paper liners or grease thoroughly.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, and salt until evenly mixed.
03 - In a large bowl, whisk sugar and eggs until light and fluffy. Incorporate yogurt, vegetable oil, lemon zest, lemon juice, and vanilla extract and mix until smooth.
04 - Gently fold dry ingredients into wet mixture just until combined to avoid overmixing.
05 - Toss blueberries with 1 teaspoon of flour to prevent sinking, then carefully fold into batter.
06 - Spoon batter evenly into muffin cups filling approximately three-quarters full. Optionally, sprinkle coarse sugar on top.
07 - Bake in preheated oven for 18 to 22 minutes or until a toothpick inserted in the center comes out clean.
08 - Allow muffins to cool in the pan for 5 minutes before transferring them to a wire rack to cool completely.