1Spray 10-inch angel food (tube) cake pan or 12-cup fluted tube cake pan with cooking spray.
2In large microwavable bowl, microwave butter uncovered on High 30 to 45 seconds or until melted. Add marshmallows; stir to coat. Microwave on High 1 minute 15 seconds to 1 minute 20 seconds, stirring every 30 seconds, until mixture can be stirred smooth. Stir in cereal and 1 1/2 cups fruit flavored snacks until well coated. Press mixture evenly in pan.
3Let stand at room temperature until firm, about 1 hour. Run knife around edge of cake to loosen; invert cake onto serving platter. Top with Betty Crocker® Fruit Gushers® fruit flavored snacks to look like jewels. Store loosely covered.