Makes 4 servings
8 teaspoons Kewpie mayonnaise
8 slices good sandwich bread
8 teaspoons unsalted butter, at room temperature
8 slices American cheese
1. Spread 1 teaspoon of mayonnaise evenly over one side of each slice of bread, and 1 teaspoon butter over the other side.
2. Top the butter side of 4 slices of bread with 2 slices of cheese each, and then top that with the remaining slices of bread, mayonnaise side up. (Butter on the inside, Kewpie mayonnaise on the outside - that's all you need to know.)
3. Fry the sandwiches in lightly greased pans or on a griddle over medium heat until golden brown and crispy, roughly 3 minutes per side. Eat while gooey and warm.