Preheat oven to 350℉. Prepare a large baking sheet with parchment paper or non-stick spray, set aside.

In a medium bowl, whisk the flour, baking soda, salt, and lemon zest. Set aside.

In large mixing bowl, with a hand mixer or stand alone mixer, beat the butter until soft and opaque in color.  Next, add the sugar and mix until light and fluffy.  Then add the egg, vanilla, and lemon juice. Mix until fully combined.  Make sure to scrape the sides of the bowl and fully incorporate the mix.

While your mixer is on low, add in the dry ingredients. Mix until fully combined.

Using a tablespoon, scoop cookie dough by the spoonful onto the prepared cookie sheet. Bake until light and golden around the edges, approximately 12 minutes.  Do not over bake the cookies. 

Once cookies are baked, remove from oven and allow cookies to cool for 2-3 minutes before removing and placing on wire rack.   

While cookies are cooling prepare the glaze.  Whisk the powdered sugar, lemon juice, and lemon zest together until fully combined. Spoon onto the top of each cookies.  Glaze will harden after a few minutes on the cookies.