Coat a roasting pan with cooking spray. Add cookie pieces and popped popcorn. Keep warm in 250°F standard oven.
Meanwhile, combine sugar, corn syrup, butter and salt in heavy saucepan. Cook on medium heat until butter is melted, stirring until blended. Bring mixture to boil. Boil 5 min. without stirring. Remove from heat. Stir in remaining ingredients. Remove popcorn mixture from oven and drizzle with hot sugar mixture. Stir to combine.
Bake coated popcorn 40 min., stirring every 10 min. Remove from oven; spread onto parchment paper. Cool completely. Break into bite-size pieces to serve. Store in airtight container at room temperature.