Preheat oven to 375°F and line a 12-cup muffin pan with liners.
In a large bowl, whisk together flour, sugar, baking powder, baking soda, and salt.
In a separate bowl, whisk together Greek yogurt, eggs, melted butter or oil, milk, lemon juice, lemon zest, and vanilla extract until smooth.
Pour the wet ingredients into the dry ingredients and stir gently until just combined. Do not overmix.
Fold in the blueberries.
Divide the batter evenly into muffin cups, filling about ¾ full.
Press a few extra blueberries on top and sprinkle with coarse sugar if desired.
Bake for 18–22 minutes, or until lightly golden and a toothpick inserted comes out clean.
Cool for 5 minutes, then transfer to a wire rack.
Drizzle with lemon glaze once slightly cooled, if desired.