A year ago my now ex and myself had the opportunity to open a dinner, due to issues out of our control it didn't stay open very long but the short time it was open it made a big impression. On the menu was an array of "gourmet burgers" and sandwiches one of our most popular items was our grilled cheese. while this may seem a bit intensive for a grilled cheese sandwich trust me it is well worth it.
Melt 1/2 tbs butter in a heavy bottom skillet over medium high heat. place two slices of bread in the skillet and swirl until all the butter is absorbed. Toast until very light golden brown, about 1 minute. remove from pan and place on a cutting board place one slice of American cheese on the toasted side of each slice of bread. Add another 1/2 tbs of butter and repeat with remaining bread after removed from the pan top them with 1 slice of cheddar each.
Assemble the sandwiches so that each has one slice of American and one slice of chedder, with untoasted sides out. Melt 1 tbs of butter in the skillet over med low heat. sprinkle the skillet with 1/2 tsp of salt, add the sandwiches swirling them around the pan ubtil all butter is absorbed. toast til the first side is a deep golden brown. about 3 minutes. reduce the heat if the butter begins to burn.
Remove the sandwiches and melt the remaining tbs of butter, sprinkle with another 1/2 tsp of salt then return the sandwiches untoasted side down and swirl until the butter is absorbed. toast until the second side is a deep golden brown and the cheese is thoroughly melted. about 3 minutes.
Cut the sandwiches on the diagonal and serve immediately.