Margot Robbie and Colin Farrell have been enjoying potato chip sandwiches, also known as crisp sandwiches, while working together on their new film. Farrell has been making these sandwiches for Robbie, using Irish Taytos or British Walker’s Salt & Vinegar chips. This simple sandwich consists of potato chips between slices of bread with a spread, like butter (or vegan butter), and any flavor of potato chip.

The potato chip sandwich is a nostalgic and fun treat enjoyed by many, with origins possibly tracing back to an Irish mother in the 1960s. Many popular potato chip brands happen to be vegan, making it easy for anyone to try this unique and tasty snack. If you want to join the likes of Robbie, Farrell, and British chef Nigella Lawson in indulging in this classic crisp sandwich, all you need to do is grab your favorite vegan potato chips, bread, spread, and enjoy the crunchy goodness.