In small bowl, mix caramel topping and 1 tablespoon of the cake mix; set aside. In large bowl beat remaining cake mix, butter and egg with electric mixer on low speed about 1 minute or just until crumbly. Stir in oats, using hands if necessary. Reserve 1 cup oat mixture. Using a piece of plastic wrap on crumb mixture, press remaining oat mixture in bottom of pan; remove plastic wrap. Bake 14 to 18 minutes or until light golden brown.