Preheat Oven: Set your oven to 400°F (200°C).

Prepare Muffin Tin: Line a 12-cup muffin tin with paper liners.

Mix Dry Ingredients: In a large bowl, combine the flour, sugar, baking powder, and salt. Whisk until well mixed.

Mix Wet Ingredients: In another bowl, whisk together the eggs, milk, oil, lemon juice, and lemon zest.

Combine Wet and Dry Ingredients: Gently fold the wet ingredients into the dry ingredients until just combined. Be careful not to overmix.

Add Blueberries: Gently fold in the blueberries, taking care not to crush them.

Fill Muffin Cups: Distribute the batter evenly among the prepared muffin cups, filling each about three-quarters full.

Bake: Place in the oven and bake for 18-20 minutes, or until a toothpick inserted into the center of a muffin comes out clean.

Cool: Allow muffins to cool in the pan for a few minutes before transferring them to a wire rack to cool completely.