Preparation

1. Pre-heat oven to 200°
2. Pour ¾ cup of milk into sauce pan, over medium heat bring to almost boiling
3. Crumble in yeast and add tbsp. of sugar. Stir and place pan in warm oven
4. Add butter to bowl of stand mixer with paddle attachment and mix at medium speed until creamy
5. Add salt, then 1 egg yolk and 1 cup of flour at a time until combined
6. On 5th cup of flour also add warmed mixture from oven
7. Mix until dough forms
8. Set dough aside
9. Add walnuts and 1 cup of sugar to bowl of food processor with blade attachment
10. Run until nuts are fine and combined with sugar
11. Place nut mixture in a bowl
12. Beat egg whites until frothy and stiff peaks form
13. Add egg whites to nuts and mix thoroughly, add milk or water a tablespoon at a time until mixture is creamy like peanut butter
14. Pre-heat oven to 350°
15. Sprinkle 1 cup of sugar over work surface and roll dough into 1 inch balls
16. Roll balls in sugar and roll out to 3 inch discs
17. Place a teaspoon of nut mixture in center of disc and spread to edges
18. Roll into a small cylinder and place seam side down onto baking sheet covered with parchment paper and sprinkle more sugar over top of cookie
19. Bake for 10-15 minutes until bottom of cookie is lightly browned on the bottom
20. Start to check cookies at 10 minutes, due to oven variances
21. Place on cooling rack until cool.