Preheat oven to 400 degrees F.
Spray mini muffin tins with cooking spray.
Cook pasta according to packaged directions and set aside.
In a medium size pan combine butter and flour over medium heat. Whisk until butter is melted and mixture is smooth. Slowly add milk and bring to a simmer. Add 1 ½ cups of the cheese, cream cheese, salt and pepper. Stir until smooth and creamy. Remove from heat.
In a large mixing bowl, carefully stir pasta, cheese sauce, and egg until evenly mixed and pasta is evenly coated.
Spoon mac and cheese into mini muffin tins and top each with a small pinch of remaining cheese.
Bake at 400 degrees F for 15 minutes or until golden brown.
Allow to cool 5 minutes before gently removing the bites.
