2/3 cup unsalted butter, at room temperature
1/3 cup granulated sugar
2 large egg yolks
1 teaspoon vanilla extract
1/2 teaspoon salt
1-1/2 cups all-purpose flour
2 large egg whites
3/4 cup finely chopped nuts of choice
1/3 cup jam (any flavor)
Preheat oven to 350 F.
Line baking sheets with parchment paper or a non-stick
In a large bowl, beat together butter and sugar until light and fluffy.
Beat in egg yolks,
vanilla extract and salt. Gradually stir in flour.
Form dough into 1-inch diameter
in lightly beaten egg whites, then roll in nuts.
Place 1 inch apart on prepared
sheets. Press down center of each with thumb.
Bake for 16 to 18 minutes, or
Cool on baking sheet for 5 minutes, then remove to a wire rack to cool
Just before serving, fill centers of cookies with jam. Or, fill centers with
1/2 teaspoon of
jam before baking.