In a bowl, gently mix the ground beef with salt, pepper, smoked paprika, chili powder, garlic powder, Worcestershire, and brown sugar. Do not overwork the meat—mix just until combined.
Divide into 4 equal portions and form 4 patties about 3/4 inch thick. Press a small dimple in the center of each to prevent bulging.
Preheat your grill, grill pan, or cast-iron skillet to medium-high. Oil the grates or pan lightly.
Place the patties on the hot surface.
Cook for 3–4 minutes without moving them to develop a crust.
Flip, then brush the tops with BBQ sauce. Cook another 3–4 minutes. Brush again for a glossy finish.
For cheeseburgers, add cheese in the last minute and cover to melt.
Check doneness. For medium, aim for an internal temp of about 140–145°F; for well-done, 160°F. Remove and rest 3 minutes.
Toast buns in a little butter or oil until golden.
Build your burgers: bun, lettuce, patty, extra BBQ sauce, onion, tomato, pickles, and jalapeños if using.
Top with the bun and serve.