Step 1

In a large bowl, add the softened butter and sugar, and cream them together until the mixture is light and fluffy.

Step 2

Mix in the egg yolks and vanilla extract until well combined.

Step 3

Add in the salt, then slowly add the flour while mixing until well incorporated and the dough comes together.

Step 4

Place the dough into a piping bag, and use a large star tip to pipe out circles of cookie dough onto a nonstick baking sheet. Or, for an easier version, use a cookie scoop to drop cookie dough onto nonstick baking sheets.

Step 5

Place the baking sheets into the fridge, and chill for at least 30 minutes.

Step 6

Preheat the oven to 350 F.

Step 7

Bake the cookies for 12 to 15 minutes until the edges are just golden brown.

Step 8

Let the cookies cool for 5 minutes, then transfer them to a wire rack to cool completely.