Prepare Cowboy Butter by mixing melted unsalted butter, minced garlic, parsley, Dijon mustard, red pepper flakes, lemon juice, paprika, salt, and pepper in a bowl.

Pat your choice of steak dry, season both sides with salt and pepper, and let sit at room temperature for 10 minutes.

Heat olive oil in a skillet over medium-high heat and sear the steak for 3–4 minutes on each side until medium-rare. Let rest for 5–10 minutes before slicing.

Toast slider buns cut side down in the same skillet for 2-3 minutes until golden brown.

Assemble sliders by adding sliced steak and cowboy butter to the buns, adding any desired toppings.

Serve immediately with extra cowboy butter on the side.