1. In small mixing bowl beat cream cheese on medium speed of electric mixer until fluffy. Add cheddar cheese, milk, garlic powder and cayenne pepper. Beat until combined. Spread cream cheese in 7-inch circle on serving plate.
2. Spoon barbecue sauce on top. Sprinkle with chicken and onion. Serve with crackers.
*NOTE: Soften cream cheese in microwave at high for 15 to 20 seconds.