½cuppowdered sugarcan add 2 Tablespoons more powdered sugar for a thicker glaze.
Instructions
Cookies
Preheat oven to 350° F. Beat together the butter and sugar on high until light and fluffy, about 2-3 minutes. Add egg and beat until combined. Add key lime zest, key lime juice and vanilla and beat until well combined. Scrape down the sides and combine.
Add flour, salt, baking powder, and baking soda. Mix on low just until combined. The dough is much looser than normal cookie dough. See process photo above for a picture of the texture.
Line a baking sheet with parchment paper and scoop out dough balls about 1 ½" in diameter on the sheet. Allow room for them to spread while baking. Bake until the edges have set and the tops are matte, about 10-12 minutes. Do not wait for them to turn golden or they will be dry! Remove from oven and allow to finish cooking for 5-8 minutes. Transfer to a cooling rack.
Glaze
Whisk together the key lime juice and powdered sugar together in a small bowl. Add more powdered sugar if needed. The glaze should be thick enough that it won't seep into the cookie and thin enough to get a good drizzle. See picture above in step by step instructions for reference.
Drizzle glaze over cooled cookies and Enjoy!!
Notes
Store in an airtight container at room temperature for up to 3 days. It will take longer for them to go bad, but the texture will be compromised.
Store in the freezer for up to 2 months. I like to freeze them when they are fresh and still oh so slightly warm for maximum softness upon defrosting.
Tip: Do not over bake! For the perfect texture, remove from oven as soon as the tops are matte and the edges are set. This will create a cookie that is juuuuuuuust barely done in the center. For a more done cookie, cook an additional 2 minutes after the tops are matte and the edges are set. They won't be quite as soft and chewy.
Tip: Wait until the cookies have cooled completely to add the glaze or it will seep into the cookie.
Do Not substitute regular lime juice, even for just a portion of this recipe. It doesn't taste right and you will be disappointed in your cookies.