Step 1
Preheat oven to 350 degrees F (175 degrees C). Lightly spray bottom and sides of a 9x13-inch baking pan with cooking spray.
Step 2
Stir cookie mix oil and egg together in a large bowl until a soft dough forms. Drop 3 heaping tablespoons of dough on an ungreased baking sheet 2 inches apart to make 3 cookies.
Step 3
Bake cookies in the preheated oven until set 12 to 13 minutes. Cool on the baking sheet 2 minutes. Transfer to a wire rack to cool completely about 15 minutes.
Step 4
Press remaining dough evenly into the bottom of the baking pan.
Step 5
Measure 1 cup cherry pie filling into a small bowl and reserve for the topping; cover with plastic wrap and store in the refrigerator.
Step 6
Beat cream cheese remaining cherry pie filling and white sugar together in a large bowl with an electric mixer on medium speed until well-blended about 2 minutes. Spread cream cheese mixture over dough.
Step 7
Bake in the preheated oven until set 35 to 40 minutes. Let cool about 30 minutes. Refrigerate until chilled about 1 hour.
Step 8
Spread whipped topping over cream cheese layer. Top with spoonfuls of the reserved pie filling. Crumble cookies into coarse crumbs and sprinkle on top. Chill until flavors blend at least 1 hour. Cut into 20 bars.