Create a coffin template using cardstock or paper.
Place the template onto each slice of bread and cut around it with a sharp knife.
Spread butter or mayonnaise on one side of each bread slice.
Layer ham and cheese onto half of the coffin-shaped bread pieces.
Top with the remaining bread slices to form sandwiches.
Trim any excess filling so the coffin shape remains neat.
Arrange on a serving board and decorate with Halloween-themed garnishes if desired.
Serve immediately or refrigerate until ready to serve.
