Preheat your oven to 325°F (165°C) and line an 8x8-inch baking pan with parchment paper.

In a mixing bowl, cream together the softened unsalted butter and granulated sugar using an electric mixer on medium speed for 2-3 minutes.

Incorporate the kosher salt and vanilla extract, followed by the all-purpose flour, mixing until just combined.

Transfer the dough into the prepared baking pan, pressing it down evenly and covering with plastic wrap.

Dock the dough by making 36 shallow pricks across the surface with a fork and refrigerate for about 30 minutes.

Bake in the preheated oven for 30-35 minutes until golden brown around the edges.

Remove from the oven, allow to cool for about 5 minutes, then cut into desired shapes.

Let the cut biscuits cool for another 10-15 minutes in the pan before enjoying.