Zimtsterne

3 tablespoons butter
1 1/2 cups sugar
2 whole eggs
1 egg, separated
1 teaspoon lemon juice
2 1/3 cups flour
2 1/2 teaspoons baking powder
1/4 teaspoon salt
1 1/4 teaspoon cinnamon
1/4 teaspoon nutmeg
1/2 cup walnuts (chopped fine)

Mix butter, sugar the 2 whole eggs, the extra egg yolk, and the lemon juice until fluffy
Combine dry ingredients
Add dry ingredients to butter mixture
Stir in nuts
Roll out dough to 1/16" thickness, cut cookies
Place cookies on lightly greased cookie sheet
Beat remaining egg white until frothy
Brush cookies with egg white
Bake at 375 F for 6 to 8 minutes