In a large bowl, combine the butter, sugars, and salt. Beat at medium speed with an electric mixer for 2-3 minutes, or until light and fluffy. Beat in the yolk, vanilla, and almond extract.
Add the flour and stir until well combined.
On a countertop, roll the dough into a log shape that is about 12 inches long. It should be about 1 1/2" wide.
If desired, pour sprinkles in a 9x13" pan. Roll the log until it is evenly coated with sprinkles, pressing them gently into the sides. Wrap the coated log in plastic wrap and chill for at least 3 hours, or overnight.
When the dough is completely chilled, preheat your oven to 350 degrees. Line 2 cookie sheets with silicone liners or parchment paper.
Use a sharp knife to cut the dough into 1/4" thick slices. Place about 1 1/2 inches apart on the prepared baking sheets.
Bake for about 10 minutes, or until set. For a crunchier cookie, bake until they turn golden brown.
Let the cookies sit on the pan for 2-3 minutes, then transfer to a wire rack to cool completely.