Preheat oven to 375 degrees. Line 3 large baking sheets with parchment paper
In a large mixer bowl sift or whisk together the dry ingredients until no lumps are in the dry ingredients
Add the eggs, Beat on low 10 seconds. Increase speed to medium-low. Beat on medium low about 30 seconds or until fully combined and the mixture is crumbly
Add the butter, sour cream, vanilla and lemon juice. Beat on low 10 seconds. Increase speed to medium. Beat on medium another 30 seconds or until fully combined and creamy. Fold in lemon peel if using
Scoop dough out 1 table spoon at a time onto the prepared baking sheets and roll each scoop into a smooth ball. Gently flatten the tops of each dough ball to the desired shape and thickness
Place in preheated oven. Bake at 375 degrees for 8-10 minutes or until golden on the edges
Remove from the oven. They will be soft but will firm up as they cool. Cool on the pan for 15 minutes. Make glaze while cookies are cooling