Jam Thumbprints

Ingredients

• 0.7 cup butter 
• 2  egg whites lightly beaten
• 2  egg yolks 
• 1.5 cups flour all-purpose
• 0.5 teaspoon salt 
• 0.3 cup strawberry preserves 
• 1 teaspoon vanilla extract 
• 0.8 cup walnuts finely chopped
• 0.3 cup sugar white

Equipment

• bowl
• baking sheet
• baking paper
• oven
• wire rack

Directions

1. Preheat oven to 350 degrees F (175 degrees C). Lightly grease cookie sheets, or line with parchment paper.
2. In a large bowl, cream together butter and sugar until light and fluffy. Beat in egg yolks, vanilla, and salt. Gradually mix in flour.
3. Shape dough into 3/4 inch balls. Dip in lightly beaten egg whites, then roll in finely chopped walnuts.
4. Place 1 inch apart on prepared cookie sheets. Press down center of each with thumb.
5. Bake for 15 to 17 minutes, or until golden brown. Cool on baking sheet for 5 minutes, then remove to a wire rack to cool completely. Just before serving, fill centers of cookies with strawberry preserves.