Step 1

In a stand mixer fitted with a paddle attachment, beat butter and vanilla extract until creamed.

Step 2

Add confectioners sugar and salt; mix until combined.

Step 3

Scrape bowl down and add flour while beating on low. Scrape bowl once more and mix until combined.

Step 4

Shape the dough into a rectangular prism, wrap in plastic and chill until firm. At least an hour.

Step 5

Preheat oven to 350F (177C). Use a sharp knife to cut 1/2 inch thick slices

Step 6

Place slices, spaced at least an inch apart onto a baking sheet lined with a silicone mat or parchment paper.

Step 7

Use a fork or skewer to indent a pattern onto the top.

Step 8

Bake for about 10 minutes, rotating baking sheet in the oven halfway through.

Step 9

Transfer to a wire sheet to cool.