Prepare the croissants

• Slice the croissants in half horizontally.
• Spread the cut sides with butter.

Toast the croissants

• Place the croissants cut side down in a hot frying pan.
• Toast until golden and crisp, then set aside.

Smash the patties

• Place the beef balls in the hot pan and smash them flat with a spatula.
• Season with salt and pepper.
• Flip and top with the cheese slices to melt.

Assemble the burgers

• Spread burger sauce on the croissant bases.
• Add the smashed cheesy patties.
• Close with the croissant tops and serve immediately.