Step 1

Heat oven to 325°F. Spray bottom and sides of 9-inch springform pan with cooking spray.

Step 2

In large bowl, mix cookie mix, vegetable oil, water, egg, peanut butter and oats with spoon until mixture comes together. Stir in 1/2 cup candies, the chocolate chips and peanuts. Press into pan.

Step 3

Bake 26 to 30 minutes or until golden brown. Cool 10 minutes; release side of pan. Cool completely, about 1 hour.

Step 4

When ready to serve, fit small decorating bag with 1/2-inch star piping tip; fill with frosting. Pipe 12 rosettes around top outer edge of cake; garnish with 1 tablespoon candies. Store in airtight container at room temperature.