
1. Preheat the oven to 325°F.
2. Pat the chicken dry using a paper towel and place in a Dutch oven or heavy-bottom pan with a lid.
3. Season both sides of the chicken with Kosher salt, pepper, garlic powder, and cayenne pepper.
4. Mix the BBQ sauce and chipotles in adobo sauce together.
5. Pour the chipotle BBQ sauce over the chicken, making sure it is covered in sauce.
6. Place the lid on the pan and bake for 90 minutes.
7. When the chicken has cooked, use two forks to gently shred the chicken in the chipotle BBQ sauce.
8. Preheat the oven to 425°F.
9. Place the corn tortillas on a baking sheet and lightly coat each side with a tiny drizzle of olive oil.
10. Bake for about 8 minutes until the tortillas are crispy.
11. Sprinkle the pepper jack over 4 of the tortillas and stack the remaining 4 tortillas on top.
12. Place back in the oven for about 3-5 minutes until the cheese is melted.
13. Top each tostada stack with the shredded BBQ chicken and a dollop of chipotle sour cream.
14. Garnish with sliced red onion, sliced jalapeños, and fresh cilantro.