Mix together the ingredients for the ranch dressing, in a medium-sized mixing bowl. Keep covered in the refrigerator while you prep the burgers.
½ cup Mayonnaise, ½ cup Sour cream, ½ cup Whole milk, ½ Lemon juiced, 2 tablespoon Fresh dill finely chopped, 2 tablespoon Chives finely chopped, 1 teaspoon Garlic powder, 1 teaspoon Onion powder, ½ teaspoon Black pepper
Add the ground beef and spices to a large mixing bowl.
1 lb Ground beef, 1 teaspoon Garlic powder, 1 teaspoon Onion powder, 1 teaspoon Black pepper, 1 teaspoon Garlic powder, Salt to taste
Using a 1 ½ tablespoon ice cream scoop, portion out the ground beef into balls.
Preheat a cast iron skillet over medium-high heat. Spray the skillet with nonstick cooking spray, and add the slider portions to the skillet. Let the balls get brown and gain a crust for 1-2 minutes. Using a spatula, press down on the balls to flatten the burgers into patties.
Let the patties cook on the same side for another 1-2 minutes, and flip. Let the patties cook for another 2-3 minutes, and remove from the pan.
If you have an excessive amount of grease in the skillet, drain it out of the skillet. Add the diced onions to the same skillet over medium-high heat. Let the onions brown and become lightly caramelized.
½ Sweet onion
Add the burgers back to the skillet, on top of the grilled onions. Top each burger with the cheddar cheese pieces, and turn the heat off. Cover the skillet with a lid, or a sheet tray that is large enough, until the cheese is melted.
3 slices Sharp cheddar cheese
Assemble the sliders by spreading the ranch dressing onto the slider buns. Top with the slider patty, and additional grilled onions.
12 Slider buns