Prep your cheese! Put ¼ c. cheese in each of the bowls.
Add food coloring. Put one color in each bowl and stir until it is fully mixed. You can add as much food coloring as you’d like until you get the color you want.
Prep your bread! Spread butter on one side of each piece of bread.
While you are doing this, heat your pan on medium-low heat.
Put cheese on bread. Place butter side down on a plate and working in rows, put each color of cheese side by side.
Cook your sandwich! Place the piece of bread with your cheese on it in the pan first (butter side down). Top with your second piece of bread (butter side up). Cook for about 5 minutes or until cooked to your liking.
Flip and cover. Once the first side of your sandwich is cooked to your liking, carefully flip the sandwich and cook for another 5 minutes. Cover your pan with a lid so the cheese gets nice and gooey!