Sable is French for "sand." And a crumbly, sandy crust (or cookie) is what this dough will get you. It's perfect for tarts. Add in lemon zest, vanilla, lavender flowers, etc to flavor it in any way you wish.
Add flour and mix on low just until the dough has come together.
Chill in the fridge for a couple of hours, then roll and use as you will.
Bake at 350 degrees, F, until lightly golden brown and delicious.
Notes
Note that baking times will vary depending on what you're using your sable for. Keep an eye on it. The dough should be firm, golden around the edges and lightly golden on top.