Mix the ground bacon and beef until they are thoroughly combined.
Using a 1/4 cup measuring cup, form nine small patties.
Heat a large skillet over medium-high heat, and arrange the patties in the pan without the sides touching. Using your fingertips, press a small indention in the top of each patty. This will help them stay flat as they cook.
Cook the patties on medium to medium-high heat for 4 to 5 minutes on each side. If it appears to be cooking too hot, turn the heat down a little. ** See my notes below for more on this.
When the patties are done, remove them from the pan and let them rest on a paper towel while you make the blue cheese sauce.
To make the blue cheese sauce, just add the mayonnaise, blue cheese crumbles, hot sauce, and half of the green onion to a small bowl. Stir to combine. I like to use the back of my spoon to break up the blue cheese in the sauce. This helps infuse the blue cheese flavor and breaks up any large chunks. Taste and adjust the seasoning, adding salt, pepper and more hot sauce, if desired. ** See my note below about the salt.
To assemble the sliders, lay a piece of lettuce on the bottom bun, followed by a beef/bacon patty and then a dollop of sauce. If desired, you can garnish with extra blue cheese crumbles and green onions!
Bacon can be very salty, and all brands are different. Also, the blue cheese is a little salty, so I have never needed to add any salt to this recipe.