Stir in the breadcrumbs, beaten egg, cumin, chili powder, smoked paprika, salt, and pepper. Mix until just combined. If the mixture seems too wet, add 1 more tablespoon of breadcrumbs.
Divide the mixture into four equal portions and form into patties about 3/4 inch thick. Chill the patties in the refrigerator for at least 30 minutes; this helps them firm up.
Heat a large skillet over medium heat and add enough olive oil to lightly coat the bottom, or preheat your grill to medium.
Cook the patties for 4 to 6 minutes per side until heated through and browned. If grilling, be careful when flipping to prevent breakage.
Serve immediately on hamburger buns with your preferred toppings.
Notes
For a gluten-free option, use gluten-free breadcrumbs or oat flour as a binder.
To make a flax egg for a vegan burger, mix 1 tablespoon ground flaxseed with 3 tablespoons water and let it sit for 5 minutes until gelled.
These patties freeze well. Place cooked or uncooked patties on parchment paper, freeze until solid, then transfer to a freezer bag for up to 3 months.