The best sandwich recipe ever is here!
Once the butter is melted, add in the flour and whisk constantly to avoid it from burning.
Mix and check for seasoning, then take off from the heat and set aside.
Image Credit: FlavCity with Bobby Parrish via YouTube
Bake for 12 minutes until crispy, take out and set aside.
Using a cast iron pan or sheet pan, lay both toasted bread slices down.
Then, top each sandwich with a generous amount of cheese sauce.
Add shredded cheddar and place under the broiler for 5 minutes until nice and bubbly.