With your ingredients ready, let’s move on to the fun part – baking! Here’s how to create these irresistible muffins:

1. Preheat your oven to 375°F (190°C) and line a 12-cup muffin tin with paper liners or lightly grease with butter.
2. In a large mixing bowl, whisk together the flour, sugar, baking powder, and salt until well combined.
3. In a separate bowl, mix the melted butter, eggs, milk, lemon zest, lemon juice, and vanilla extract until smooth.
4. Pour the wet ingredients into the dry ingredients and gently stir until just combined. Be careful not to overmix, as this can make the muffins dense.
5. Gently fold in the blueberries, ensuring they are evenly distributed throughout the batter.
6. Spoon the batter into the prepared muffin cups, filling each about three-quarters full.
7. Bake in the preheated oven for 18-22 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
8. Allow the muffins to cool in the pan for 5 minutes before transferring them to a wire rack to cool completely. Enjoy warm or at room temperature.

Remember, the key to perfect muffins is not overmixing the batter and ensuring your oven is fully preheated before baking. These little tricks make all the difference!