Bunsen Straight Up Burgers is a well-loved chain of fast-food restaurants specialising in serving fresh, quality burgers. The chain was founded by the Bunsen brothers and currently has over 40 locations in Ireland. The menu consists of an array of different burgers including sandwiches, salads, and a variety of sides and desserts.

As a fast-food chain, the restaurants are all quick service and have a minimal seating capacity, in order to ensure that all of the food is cooked to a high standard and delivered to the customer as quickly as possible. Each restaurant also has a separate cashier area where the transactions are carried out, and have a large menu of different products to offer the customers.

Bunsen Straight Up Burgers is one of the most well-loved chains of fast-food restaurants in Ireland.