COOK IT.
Add bacon to preheated griddle.
While bacon cooks, create the cream cheese filling: In a medium bowl, mix together cheddar cheese, cream cheese, mozzarella, and chopped jalapeño peppers. Season the mixture with salt and black pepper, then fold in cooked bacon bits.
Grab your burger patties and spoon approximately a ¼ cup of filling mixture onto one, then place a second beef patty on top. Pinch the patty edges to seal the burger. Re-shape the ground beef patties into a disc if necessary. Repeat this process with the remaining patties and filling mixture.
Season the beef burgers on both sides with chili powder, salt, and pepper. Place prepared burgers on the grill and cook until cooked through, or to your preference. For a medium cook, grill about 6 minutes per side.
Once done, place each burger patty on a bun, add any toppings you like, and go buck wild.