Thumbprint Cookies

Ingredients

• 1 large egg , separated, divided
• 0.5 cups butter , softened
• 0.25 cups packed brown sugar
• 1 cup all-purpose flour
• 0.5 teaspoons vanilla extract
• 0.25 teaspoons salt
• 0.25 cups finely chopped walnuts
• 0.67 cups any flavor fruit jam

Instructions

1. 1

   Gather ingredients.

2. 2

   Preheat the oven to 300 degrees F (150 degrees C). Grease two cookie sheets and set aside.

3. 3

   Whisk egg white in a small bowl. Place chopped walnuts in another small bowl.

4. 4

   Cream butter, brown sugar, and egg yolk in a mixing bowl until light and fluffy, about 2 minutes.

5. 5

   Add flour, vanilla, and salt; mix until well combined.

6. 6

   Scoop dough into 1 ½-inch balls. Dip in egg white, then roll in walnuts until coated. Place 2 inches apart on the prepared cookie sheets.

7. 7

   Bake in the preheated oven until slightly puffed, about 5 minutes.

8. 8

   Remove cookies from the oven. Use your thumb or the end of a wooden spoon to gently press an indent in the center of each cookie. Spoon jam into each thumbprint, filling it to the brim.

9. 9

   Return cookies to the oven and bake until set, about 8 minutes.

10. 10

    Remove from the oven and transfer to wire racks to cool completely.