Step 1: Place the chicken breasts in the bottom of the slow cooker and sprinkle evenly with taco seasoning.
Step 2: Pour the salsa over the chicken, cover, and cook on high for 3-4 hours or low for 6-7 hours.
Step 3: Once cooked, use two forks to shred the chicken directly in the slow cooker, allowing it to mix with the cooking juices.
Step 4: Stir in the white queso dip until the chicken is thoroughly coated and creamy.
Step 5: Heat a large skillet over medium heat and add a small amount of butter.
Step 6: Place a tortilla in the skillet, spread a layer of the chicken mixture on one half, and sprinkle with shredded cheese.
Step 7: Fold the tortilla in half and cook for 2-3 minutes per side until golden brown and the cheese is melted.
Step 8: Repeat with remaining tortillas and serve your crockpot queso chicken quesadillas hot with your favorite toppings.