Blackberry Walnut Cookies

Directions

1. 1.

   Preheat oven to 350°F with rack in middle.

2. 2.

   Blend together butter, sugars, vanilla, and 3/4 teaspoon salt in a bowl with a fork. Stir in flour and nuts (dough will be sticky).

3. 3.

   Form level tablespoons of dough into balls (total of 40) and arrange 2 inches apart on 2 ungreased large baking sheets. Flatten balls to 1/3 inch thick using bottom of a glass dipped in flour. Bake, 1 sheet at a time, until edges are golden, about 20 minutes. Cool cookies on sheets 5 minutes, then transfer to racks to cool completely.

4. 4.

   Spoon 1 teaspoon jam onto flat sides of 20 cookies, then sandwich with remaining cookies.