01 -  Preheat oven to 375°F (190°C). Line a 12-cup muffin tin with paper liners or grease lightly. 
 02 -  In a large bowl, whisk together flour, sugar, baking powder, baking soda, and salt. 
 03 -  In another bowl, whisk melted butter, eggs, yogurt, vanilla, and lemon zest until smooth. 
 04 -  Add wet ingredients to dry and mix gently until just combined (do not overmix). 
 05 -  Fold in blueberries with a spatula. 
 06 -  Divide batter evenly among muffin cups, filling each about ¾ full. 
 07 -  Bake for 18–22 minutes, or until a toothpick inserted into the center comes out clean. 
 08 -  Let muffins cool in the pan for 5 minutes, then transfer to a wire rack to cool completely. 
 09 -  In a small bowl, whisk powdered sugar with lemon juice to form a smooth glaze. 
 10 -  Drizzle glaze over cooled muffins and garnish with extra lemon zest if desired.