Preheat the oven to 375F. Grease a standard 12-cup muffin tin.
In a small bowl, stir together the sugar and lemon zest, until well combined. Set aside.
In a medium bowl, whisk together the flour, baking powder, and salt.
In a large bowl, combine yogurt, lemon sugar mixture, eggs, egg yolk, lemon juice, vanilla, and olive oil.
Add the flour mixture to the yogurt mixture and stir until just combined.
Divide the batter evenly between the muffin cups and bake in the preheated oven for 15-20 minutes, or until a toothpick inserted in the center comes out clean.
Video
Notes
Storage
Room temperature: Lemon muffins can be stored at room temperature for up to 2 days in an airtight container. Just make sure to store them in a cool, dry place.Refrigerator: You can store these lemon muffins in an airtight container in the refrigerator for up to 5 days.Freezer: You can store these lemon muffins for up to 3 months in the freezer. To thaw frozen lemon muffins, simply let them thaw at room temperature for a few hours.