Absolutely, using a slow cooker for BBQ chicken drumsticks is a great idea for tender, fall-off-the-bone meat. Here’s how to adjust the recipe for slow cooking:

### Slow Cooker BBQ Chicken Drumsticks Recipe

**Ingredients:**
- **Chicken:**
  - 4 lbs chicken drumsticks
  - Salt and freshly ground black pepper to taste

- **Marinade/Sauce:**
  - 1 medium onion, finely chopped
  - 4 cloves garlic, minced
  - 1 and 1/2 cups barbecue sauce (homemade or your favorite brand)
  - 1 Tbsp brown sugar
  - 1 tsp cumin
  - 1/4 tsp cayenne pepper (adjust based on heat preference)
  - 1 Tbsp smoked paprika
  - 2 tsp Dijon mustard
  - 3 Tbsp fresh basil, chopped
  - 3 bay leaves
  - Optional: 1/4 cup apple cider vinegar (for added tanginess)

**Instructions:**

1. **Prepare the Marinade:**
   - In a bowl, combine barbecue sauce, brown sugar, cumin, cayenne pepper, smoked paprika, Dijon mustard, and apple cider vinegar (if using). Mix well to blend the flavors.
   - Stir in the chopped onion, minced garlic, chopped basil, and bay leaves.

2. **Marinate the Drumsticks (Optional):**
   - Season the drumsticks with salt and pepper.
   - You can optionally marinate the drumsticks in the prepared sauce for a few hours or overnight in the refrigerator to enhance the flavor, but this step can be skipped if you're short on time.

3. **Cook in the Slow Cooker:**
   - Place the seasoned drumsticks in the slow cooker.
   - Pour the marinade over the drumsticks, making sure they are well coated.
   - Cover and cook on low for about 6-7 hours or on high for about 3-4 hours, until the chicken is tender and fully cooked.

4. **Finish with a Glaze:**
   - If you desire a more caramelized finish, you can transfer the cooked drumsticks to a baking sheet lined with foil or a silicone mat.
   - Broil in the oven for 2-5 minutes on high, or until the outside is slightly crisped and caramelized.
   - Alternatively, before serving, you can remove the drumsticks, pour the sauce from the slow cooker into a saucepan, bring it to a boil, and simmer until thickened to use as a glaze or serving sauce.

5. **Serve:**
   - Brush the drumsticks with the reduced sauce if you’ve thickened it on the stovetop, or serve them directly from the slow cooker, garnished with fresh basil.

Using the slow cooker makes this dish wonderfully effortless and perfect for a no-fuss dinner. Enjoy your slow-cooked BBQ chicken drumsticks!