•  Start with a high-quality 80% lean ground beef. Form into 8 uniformed patties. Make a thumbprint in the middle of the patty. This ensures the burger doesn't puff up in the middle and make an odd shape.  
• Generously sprinkle both sides with salt and pepper. Make sure to add enough salt as it brings out the natural flavors in the beef. 
• Preheat grill to medium-high.  Cook sliders for about 4-5 minutes per side, depending on your desired level of doneness. 
• With about 1 minute left of cooking time, add cheese and let it melt onto the burger patty. 
• Place on condiment covered buns.  Top with desired toppings. 

In-N-Out Spread Recipe:

• In a small bowl, combine all ingredients and stir together.  Cover and refrigerate until chilled. The flavor will develop and become stronger in time.