Step 1
Heat oven to 350 degrees F.
Step 2
Crush 22 cookies to form fine crumbs; mix with butter. Press onto bottom of 12-inch pizza pan sprayed with cooking spray. Bake 4 minutes; cool.
Step 3
Meanwhile microwave semi-sweet chocolate and 1/2 cup whipped topping in microwaveable bowl on high 30 to 40 seconds or until chocolate is completely melted and mixture is well blended stirring after 30 seconds. Cool slightly.
Step 4
Beat pudding mix and milk in medium bowl with whisk 2 minutes (pudding will be thick). Stir in remaining whipped topping; spread onto crust to within 1/2 inch of edge.
Step 5
Spoon chocolate mixture into resealable plastic bag; snip off small piece from one bottom corner of bag. Use to drizzle chocolate mixture in spiral motion over pizza. Gently drag toothpick through lines to resemble spider's web. Refrigerate 1 hour.
Step 6
Meanwhile decorate remaining cookies with licorice pieces and candies as shown in photo using frosting to secure pieces to cookies.
Step 7
Place decorated cookies on pizza just before serving. Garnish with sprinkles.