A dash of vinegary hot sauce is a great addition here ... the meat will get tough. Crema and avocado add rich creaminess to push the burger over the top.

Shake Shake has opened its second outlet in Sunway Pyramid with the debut of the Avocado menu; giving customers the option to add avocado slices to their favourite Shake Shack burgers!

Scrape the sauce into a bowl; season with salt. ? In a medium bowl, toss the avocados with the lime juice and season with salt. Mash the avocado onto the toasts and transfer to a platter.