Slow Cooker Spicy Mac n' Cheese is a cheesy. spicy version of its classic cousin, mac n' cheese.
Cook macaroni according to package directions; drain. Place in a 5-quart slow cooker. Stir in melted butter.
In a large bowl combine the beaten egg, evaporated milk, milk, soup, cheeses, and ground mustard. Pour over macaroni; stir to combine. Cover and cook on low for 4 hours. Sprinkle with 1 cup shredded cheddar cheese. Cook 15 minutes longer or until cheese has just melted. Sprinkle with hot sauce, extra cheese and croutons before serving.
Before serving, sprinkle bowl of mac n' cheese with hot sauce, extra cheese and garlic-cheese croutons.