Preheat oven to 400°.
Spray 18 regular-sized muffin tins with cooking spray; set aside.
Wash raspberries gently in colander.
Pat dry between layers of paper towels; set aside.
In a large mixing bowl, whisk or stir flour, sugar, baking powder, baking soda and salt.
In a medium mixing bowl, combine eggs, yogurt, melted and cooled butter, lemon peel and vanilla extract.
Whisk ingredients until smooth.
Add the liquid ingredients to the dry ingredients along with the raspberries.
Stir ingredients just until moistened.
Do not overmix the batter.
Spoon batter into prepared muffin cups about ¾ full.
Bake at 400° about 18 minutes until a toothpick inserted in center comes out clean.
Allow muffins to rest in baking pan about 5 minutes before removing to wire cooling racks to cool completely.