McDonald’s is changing up its traditional burgers and Big Macs.

The fast-food chain announced the changes will impact its classic hamburger, cheeseburger, double cheeseburger, McDouble burger and Big Mac sandwiches. The changes include softer buns that will be toasted, melted cheese instead of room-temperature, caramelized onions that will be added to the patties during grilling and, for Big Macs, more of the signature sauce.