Lemon Shortbread

My mom has been keeping a Google drive folder full of recipes that she has been wanting me to make when I'm home, and since I got home she's asked me several times to make this recipe for lemon shortbread. Finally I made it while I was on another baking spree (another angel food cake, some box mix scones, pizza dough). And oh my goodness, these are good.
It's a simple recipe, although it did break my stand mixer (I accidentally tried to cream frozen butter and the poor thing died). The original recipe called for lemon sugar, which I guess is some sort of lemon infused turbinado sugar. I just used some raw cane sugar because I didn't want to go find that specific ingredient. You can do either.
My mom was telling me that when she was little she used to get shortbread at a bakery nearby, and that she hadn't had shortbread with the same texture until she had these cookies. They're flaky and crumbly and light.
It'd be interesting to try these with other citrus zests.... lime sounds good!

Lemon Shortbread

Ingredients:

1 2/3 cup flour

1/3 cup corn starch

1/4 t salt

1 cup unsalted butter (room temperature)

1/2 cup powdered sugar

1 t vanilla

1 T lemon zest

Turbinado sugar (for sprinkling)

Instructions:

1. Sift together the flour, corn starch, and salt in a medium bowl and set aside.
2. With an electric mixer, beat together the butter and the sugar until smooth, about 1-2 minutes. Beat in the vanilla extract and the lemon zest until just combined. 
3. With the mixer on lowest speed, gradually add the flour and mix until just combined. Do not overmix.
4. Remove the dough from the bowl and form it into a flattened disk, wrap in plastic wrap, and refrigerate for at least 1 hour. 
5. On a lightly floured surface, roll the dough out to 1/4". Cut shapes out with the cookie cutter of your choice. Place cookies on a parchment lined baking sheet at least 1" apart.
6. Bake the cookies at 375 degrees for 14-16 minutes or until very lightly browned.
7. Allow cookies to cool on the pan for 1 minute before transferring them to a wire rack to cool completely.
8. Eat.

Source: That Winsome Girl