1 cup all-purpose flour
1/4 tsp. baking soda
1/8 tsp. salt
3 Tbsp. stick margarine, softened
2 Tbsp. chunky peanut butter
1/2 cup firmly packed brown sugar
1/4 cup granulated sugar
1 tsp. vanilla extract
1 large egg white
Cooking spray

1. Combine first 3 ingredients in a bowl; stir well, and set aside.

2. Combine margarine and peanut butter in a large bowl; beat at medium speed of a mixer until light and fluffy. Gradually add sugars, beating at medium speed until well blended. Add vanilla and egg white; beat well. Stir in flour mixture. Turn dough out onto wax paper; shape into a 6-in. log. Wrap log in wax paper; freeze 3 hours.

3. Preheat oven to 350ºF.

4. Cut log into 24 (1/4-in. thick) slices. Place slices 1-inch apart on a baking sheet(s) coated with cooking spray.

5. Bake at 350ºF. for 8 minutes. Remove cookies from pans, and let cool on wire racks.