Step 1: Prepare the Jalapeño-Onion Topping

1. Heat olive oil in a skillet over medium heat.

2. Add sliced onions and jalapeños with a pinch of salt.

3. Sauté for 8–10 minutes, stirring often, until onions are caramelized and jalapeños are slightly softened.

4. Remove from heat and set aside.

Step 2: Form & Season the Beef

1. Divide the ground beef into 8 equal balls (about 3 oz each). Don’t overwork the meat.

2. Season each ball generously with salt, pepper, garlic powder, onion powder, and smoked paprika.

Step 3: Smash & Sear the Patties

1. Heat a cast iron skillet or griddle over high heat until very hot.

2. Place two beef balls on the skillet at a time, leaving space between them.

3. Smash down each ball immediately with a spatula or burger press until thin (about ¼ inch thick). Hold for 10 seconds.

4. Sear for 2–3 minutes without moving, until the edges are crispy and browned.

5. Flip the patties, add a slice of cheese to one of them, and cook for 1 minute more.

6. Stack the second patty on top of the one with cheese. Repeat with remaining patties.

Step 4: Toast the Buns

1. While the burgers cook, toast your buns in a separate skillet or the oven for 1–2 minutes until golden brown.

2. Optionally butter them for extra flavor.

Step 5: Assemble the Smash Burgers

1. In a small bowl, mix mayonnaise, ketchup, and mustard to create a quick burger sauce.

2. Spread sauce on the bottom and top buns.

3. Place your cheesy double smash patty on the bun, top with jalapeño-onion mix.

4. Add pickles or lettuce if desired.

5. Cap it with the top bun and serve hot.