Melt butter in saucepan.
Add in flour and let simmer for a minute.
Slowly add in the milk and let simmer for a few more minutes until bubbly.
Add 1 cup of the shredded cheese and stir until melted.
Add in macaroni and stir to cover noodles; set aside to cool or refrigerate overnight.
To make the bites: preheat oven to 375 degrees. Generously spray a mini muffin pan with non-stick cooking spray.
Scoop 1 tablespoon of Mac N Cheese into each mini muffin tin cup.
Top with remaining shredded cheese. Add more if needed to cover completely as shown.
Bake for 15 minutes or until cheese is melted and bubbly.
Let cool for 10 minutes then remove from pan. If needed, run a knife around each Mac N Cheese bite to easily release from the pan.
Enjoy immediately or store in an airtight container in the refrigerator for up to 5 days.