Heat oven to 350°F. Place paper or foil baking cup in each of 12 regular-size muffin cups.
In small bowl, place pecan chips. Lightly coat each cookie with pecans; press into dough. Place each cookie, flat side down, in muffin cup.
Bake 18 to 22 minutes or until edges are golden brown. Cool in muffin cups on cooling rack 30 minutes. (Centers of cookies will sink slightly.)
In small microwavable bowl, microwave white chips on Medium 1 minute to 1 minute 30 seconds, stirring every 30 seconds, until smooth. Stir peanut butter into melted chips until blended.
Spoon about 2 teaspoons peanut butter mixture into each cookie cup. Store in covered container.