Method:

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

2. Add sugar and salt; mix until combined.

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

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

5. Preheat oven to 177C°. Use a sharp knife to cut 1/2 inch thick slices.

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

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

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

9. Transfer to a wire sheet to cool.