To create your delightful Slow Cooker Queso Chicken Tacos, follow these simple steps:

1. Prepare Chicken: Place the boneless, skinless chicken breasts in the slow cooker.
2. Add Tomatoes: Pour the can of diced tomatoes with green chilies over the chicken.
3. Add Seasoning: Sprinkle the taco seasoning evenly over the chicken and tomatoes.
4. Pour Broth: Add the chicken broth to keep the chicken moist while cooking.
5. Cook: Cover the slow cooker and cook on low for 4-6 hours or on high for 2-3 hours, until the chicken is thoroughly cooked and shreds easily.
6. Shred Chicken: Once cooked, use two forks to shred the chicken directly in the slow cooker.
7. Add Cream Cheese: Stir in the cubed cream cheese. Allow it to melt into the chicken mixture.
8. Incorporate Cheeses: Add both shredded cheddar and Monterey Jack cheeses and mix until melted and combined.
9. Warm Tortillas: In a separate pan or microwave, warm the tortillas for easier folding.
10. Assemble Tacos: Spoon the cheesy chicken mixture into each tortilla.
11. Add Toppings: Top with diced avocado, shredded lettuce, and a dollop of sour cream.
12. Garnish: Sprinkle fresh cilantro on top and add salsa on the side for extra flavor.

By following these steps, you’ll have a batch of incredible Slow Cooker Queso Chicken Tacos ready to enjoy!