01 - In a large skillet over medium-high heat, cook the ground beef until browned, breaking it apart as it cooks, approximately 5-7 minutes. Drain excess fat from the pan.
02 - Add chili powder, smoked paprika, cumin, garlic powder, onion powder, salt, and black pepper to the browned beef. Stir constantly for 1-2 minutes to coat the meat evenly with spices. Remove from heat and set aside.
03 - In a medium saucepan, melt butter over medium heat. Whisk in cornstarch and cook for 1 minute, stirring continuously to eliminate lumps.
04 - Gradually whisk the milk into the butter-cornstarch mixture, stirring constantly to prevent lumps. Continue cooking for 2-3 minutes until the mixture thickens and coats the back of a spoon.
05 - Reduce heat to low. Add cubed cream cheese to the thickened milk mixture, stirring continuously until completely smooth and no lumps remain.
06 - Gradually add the shredded cheddar cheese and pepper jack cheese in small batches, stirring constantly until fully melted and combined into a creamy sauce.
07 - Stir the drained diced tomatoes with green chilies and pickled jalapeño slices into the cheese sauce, distributing evenly throughout.
08 - Fold the seasoned ground beef mixture into the cheese sauce using a wooden spoon, ensuring the beef is evenly distributed throughout the dip.
09 - Transfer the dip to a serving bowl or warm slow cooker. Top with fresh chopped cilantro and additional jalapeño slices. Serve immediately with tortilla chips.