This may seem a tad adventurous, but the mix of bacon, coffee and bleu cheese is incredible. Get ready to fire up your grill!
Mix the sirloin with the chopped onion and olive oil, seasoning with salt and pepper. Making four patties, press them into fresh coffee grounds until completely encrusted. BBQ them on a grill.
For the bleu cheese sauce, mix together the cream cheese, bleu cheese and milk until smooth.
Once the burgers are cooked to your liking, top each on with bacon and bleu cheese sauce. Serve on a bun or without.