Cream sugar and shortening in your mixer with the paddle attachment until light and fluffy.
Add eggs and flavoring and blend well.
Sift dry ingredients and gradually add to wet mixture.
Add lemon zest and crushed lemon drops.
Roll in balls and bake on a parchment paper lined baking sheet for 10-12 minutes or until they just begin to brown around the edges.
Let them cool on a cooling rack before frosting.
Whisk together powdered sugar and lemon juice to make a glaze.
Frost cookies, the glaze should be thick enough not to run off the cookie but soft enough it will spread a bit and form a shiny smooth top.
Notes
These cookies spread quite a bit when they back so I make them fairly small using a small cookie scoop (about 1- 1 1/2 Tbsp)and only put 9 on a cookie sheet at a time.
Always use fresh lemon juice for the best flavor.
Originally I made these cookies with 2 cups of flour when I lived at sea level. When I moved to 5,000 feet elevation I found they spread too much so I added 2 Tbsp of additional flour.
Bake just until they begin to turn golden brown around the edges.
You want the glaze soft enough that it will spread a bit after you frost the cookie and form a glossy top.