Vanilla Wafers

Directions

1. 1
   To make the dough with an electric mixer, in the mixer bowl, combine the butter, sugar and salt.
2. 2
   Beat on medium speed until smooth.
3. 3
   Reduce the speed to low, add the egg yolks and vanilla and beat until blended.
4. 4
   Add the flour and beat until incorporated and a smooth dough forms.
5. 5
   Divide the dough into 4 equal portions.
6. 6
   Roll out each portion into a log 7 inches long and about 1 1/2 inches in diameter.
7. 7
   Wrap the logs in plastic wrap and refrigerate until firm, at least 2 hours.
8. 8
   Preheat an oven to 350F
9. 9
   Line 3 rimless baking sheets with parchment paper.Using a sharp knife, cut each unwrapped log crosswise into slices 1/4 inch thick.
10. 10
    Place the cookies 1 inch apart on the prepared baking sheets.
11. 11
    Bake the cookies, 1 sheet at a time, until the edges and bottoms are golden, 12 to 15 minutes.
12. 12
    Let the cookies cool on the baking sheets for 5 minutes, then transfer them to wire racks and let cool completely.