Add the bite sized shredded wheat to a large mixing bowl. Melt the butter in a saucepan or in a bowl in the microwave. Whisk in the Worcestershire sauce, celery salt, granulated garlic and onion, and cayenne pepper. Drizzle this over the bite sized shredded wheat and toss to coat evenly. Spread in a single layer on a half-sheet pan and bake for 1 hour, stirring every 15 minutes, or until crunchy. Toss the cheese powder in while the cereal is still hot.