In a large bowl with an electric mixer or bowl of a stand mixer, using the paddle attachment, beat the butter and granulated sugar together on medium speed until creamy, about 2 minutes.
Add the egg and almond extract until well combined, scraping down the edges of the bowl as needed.
Scrape the dough from the bowl and form into two balls. Wrap them in plastic wrap or put them in ziploc bags and refrigerate in the fridge for 30 minutes.
Once they're chilled, preheat the oven to 350 degrees F and line a couple of baking sheets with parchment paper or a silicone mat.
Roll the dough out onto a lightly floured surface with a rolling pin so the dough is approximately ¼" thick, and cut them into shapes with cookie cutters. I kept thinks simple this time with a circle cookie cutter.
Place the cookies onto the prepared baking sheets and bake in the preheated oven for 9-10 minutes. The edges should be slightly golden. They will set up more as they cool.
Let the cookies cool on the baking sheet for 5 minutes and then transfer them to a wire rack to cool completely.
In a small or medium bowl, whisk together the powdered sugar, two tablespoons milk, ½ teaspoon almond extract, and salt. If you'd like, add some food color to make the icing a fun color.
Use a spoon or a knife to spread the icing onto each almond cut out cookie and then decorate as desired!