Preheat oven to 375 degrees.
Grease 12 muffin cups with cooking spray or line muffin tins with paper baking cups.
In a small mixing bowl, combine the flour, poppy seed, salt, and baking soda. Set the mixture aside.
In a large mixer bowl, beat sugar and butter with an electric mixer on medium speed till fully combined.
Beat in eggs, vanilla, lemon extract, lemon juice and lemon peel.
Add the flour mixture and yogurt alternately to the beaten mixture, beating just until combined.
Fill the muffin cups ¾ full.
Optional: Sprinkle the muffins with additional sugar on the top.
Bake in your oven for about 22-25 minutes or until a toothpick inserted comes out clean.