Making these Spicy Jalapeño-Onion Smash Burgers is a breeze! Follow these easy steps:

1. Prepare the Ingredients: Slice the onions and jalapeños, and gather your other ingredients.
2. Heat the Skillet: Place a large skillet or griddle over medium-high heat and add the vegetable oil.
3. Cook the Onions: Add the sliced onions to the skillet and cook, stirring occasionally, until they are soft and caramelized, about 5-7 minutes. Remove the onions from the skillet and set aside.
4. Smash the Burgers: In the same skillet, add the ground beef in four equal portions. Using a spatula, smash each portion flat into the skillet. Season with salt and pepper.
5. Add Jalapeños: Immediately add the sliced jalapeños on top of the smashed beef and cook until the burgers reach your desired doneness, about 3-4 minutes per side.
6. Melt the Cheese: During the last minute of cooking, place a slice of cheese on each burger and cover with a lid to melt.
7. Toast the Buns: In the remaining oil on the skillet, lightly toast the burger buns until golden brown.
8. Assemble the Burgers: Layer the caramelized onions onto the bottom half of each bun, place the cheese-topped burger on top, and add any additional toppings you desire.
9. Serve Hot: Place the top half of the bun on the burgers and serve immediately while hot!

These straightforward steps ensure you’ll have a fantastic burger ready in no time!