Cream butter and sugar for 3-5 minutes. Throw in the lime zest and and beat another minute.
Whisk together the flour and salt, and then add to the sugar. Scrape down the sides of the bowl and stir until starting to come together. Only takes a minute or two.
Dump the mixture out on to the counter and work into a dough. Create a small disk then flour the top and bottom of the dough.
Use a rolling pin, roll the dough to 1/4” thick
Cut into desired shapes or sizes
Place on a parchment lined cookie sheet and chill for at least 30 minutes.
Preheat oven to 340 degrees.
Bake for 10-12 minutes until just starting to turn brown.
Completely chill before dunking in the glaze
For glaze, whisk together the powdered sugar, lime juice and zest.
Dunk the cookies and let the excess drip off before placing on a cooling rack to dry.