Preheat your grill to medium high heat (about 350F) for direct cooking. Add a cast iron skillet to the grill 2 minutes before cooking.

Melt beef tallow in the skillet and add your thinly sliced white onions. Season the onions with salt and pepper and begin cooking on a medium heat until they are caramelized (dark brown). This should take about 45-60 minutes to achieve. When the onions are done, pull off and keep warm.

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 and burgers 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 steaks and burgers to the grill and cook for 3-4 minutes per side or until the steaks are 120F and the burgers are 165F. Before the burgers are done, top each with a slice of cheese to melt. Once everything is done, top with a little of the cowboy butter and pull off to let rest for 10 minutes.

Slice the steaks up and begin building the burgers. Start with your buns, mayonnaise, burger patty, sliced steak, caramelized onions and cowboy butter. Serve and enjoy!