Place butter and sugar in the bowl of a stand mixer. If you don’t have one this can be done with a pastry blender and spatula, just note, your arms will be sore the next morning. Mix until the butter and sugar are completely incorporated, about 2-3 minutes. Add in the vanilla extract.
Sift flour and salt into the bowl and mix until the dough starts to come together. Dump the dough onto a floured surface and work it until a large ball of dough is created. Wrap the dough into plastic wrap. I like to flatten it out a bit first to make it easier to roll out later. Then put into the refrigerator for at least 30 minutes. You can store in the fridge for 1 day, or the freezer for up to 5 days.
When you’re ready to bake. Roll the dough on a floured surface until it is about ½ inch thick. Cut into any shape you like and bake on an ungreased baking sheet for 20-25 minutes. You will know they’re done when the edges just begin to brown.
Let them cool for 15 minutes while you make the glaze.
While I make the glaze, I like to flatten the flowers I am putting on top of the cookies between two pieces of parchment paper with a book on top. This helps make them easier to work with. Mix in a bowl the powdered sugar, lemon zest and milk until a thick glaze is formed. For runnier glaze add more powdered sugar until desired texture. Same goes for thick glaze add small amounts of milk.
When cookies have cooled, take a pastry brush and brush the tops of the cookies with about ½ tablespoon of glaze each, then place the flowers right on top. Once the glaze sets, serve!
Notes
Kid-Friendly Adaptation: Have a picky eater? Omit the flowers on some of the cookies, and even the pickiest of eaters will love these!