Next, add all the ingredients for your cowboy butter to a bowl and mix. Set to the side until ready to use.
Finally, slather your steaks with oil and generously season with salt, pepper and garlic powder or your favorite steak rub. Set in the fridge until ready to cook.
Preheat a grill to medium-high heat (about 375F) for two zone indirect cooking.
Next, add your filets to the grill and cook for 3-4 minutes per side or until they are 120F. Once the steaks are done, top with a little of the cowboy butter and pull off to let rest for 10 minutes.
While keeping the slider rolls together, slice your slider rolls in half so there is a top side and bottom side.
Add the bottom side into a foil bin or cooking safe skillet.
Add a layer of cheese, sliced steaks, caramelized onions and finish with a layer of more sliced cheese plus the top part of the buns.
Gently spread a little cowboy butter over the top of the rolls.
Get your grill to a two zone medium high heat (around 350-375F) for indirect cooking.
Add your sliders in the foil bin on to the smoker to cook until they are golden brown & crispy (about 10-12 minutes). Once done, pull the sliders off and let cool for 2-3 minutes.
Slice up your sliders and serve with the cowboy butter for dipping. Enjoy!