2Preheat your grill or campfire to medium-high heat.
In a large bowl, combine the ground beef, diced onions, diced jalapenos, chili powder, smoked paprika, garlic powder, and cayenne pepper. Mix well until all ingredients are evenly distributed.
Divide the mixture into 4 equal portions and shape each portion into a patty.
Place the patties on the preheated grill or campfire and cook for about 5-7 minutes on each side, or until the internal temperature reaches 160°F (71°C).
During the last minute of cooking, place a slice of pepper jack cheese on each patty and allow it to melt.
Toast the whole wheat hamburger buns on the grill for about 1-2 minutes, or until lightly browned.
Assemble the burgers by placing each patty on a bun, then topping with sliced pickles, shredded lettuce, and a drizzle of spicy ranch dressing.
Serve immediately and enjoy your Spicy Jalapeno Campfire Hamburgers!