1Heat oven to 350°F. In food processor, place cookies and melted butter. Cover; process using quick on-and-off motions until coarse damp crumbs form. Reserve 1/2 cup mixture for top. Press remaining crumb mixture in bottom of ungreased 13x9-inch pan.
2In large bowl, beat cake mix, peanut butter and eggs with electric mixer on medium speed until well combined. Press mixture over crust in pan. Drizzle with sweetened condensed milk. Sprinkle peanut butter pieces, peanut butter chips and remaining crumb mixture evenly over top.
3Bake 30 to 35 minutes or until edges are light golden brown and center is set. Cool completely, about 1 hour, before cutting. Cut into 5 rows by 3 rows.