Follow these simple steps to create your Mini Smash Burger Sliders:

1. Prepare the Ingredients: Gather all your ingredients and set them out for easy access.
2. Heat the Pan: Preheat a large skillet or griddle over medium-high heat. Add a small amount of cooking oil to coat the surface.
3. Form the Patties: Divide the ground beef into 12 equal portions (about 2 ounces each). Gently shape each portion into a loose ball without compressing it too much.
4. Smash the Patties: Once the pan is hot, place a beef ball on the skillet. Use a spatula to smash it down into a thin patty. Season with salt and pepper.
5. Cook the Patties: Allow the patty to cook for about 2-3 minutes, until the edges are crispy and browned.
6. Flip and Add Cheese: Carefully flip the patty and place a slice of cheese on top. Cook for an additional 1-2 minutes until the cheese is melted.
7. Toast the Buns: While the patties finish cooking, split the slider buns and lightly toast them on the skillet or in a toaster.
8. Prepare the Toppings: If using, sauté the sliced onions in a separate pan until they are caramelized and golden brown.
9. Assemble the Sliders: Place each patty on the bottom half of a toasted slider bun. Add desired toppings such as lettuce, tomato, pickles, and sautéed onions.
10. Finish with the Top Bun: Place the top half of the bun on each slider and secure with a toothpick if desired.
11. Serve Immediately: Arrange the sliders on a platter and serve with ketchup and mustard on the side.

By following these steps, you’ll have a platter of Mini Smash Burger Sliders ready to impress everyone at your table!