Step 1

In a small bowl, combine the coriander, paprika and salt. Pat the chicken thighs dry with paper towels, season on both sides with the spice mixture and place in a gallon-size zip-top bag. Refrigerate for several hours but preferably overnight.

Step 2

Prepare and preheat your lump charcoal grill to create two heat zones: high and low.

Step 3

Brush the chicken thighs with olive oil and place them skin-side down on the hot side of the grill. Cover and cook for 2 minutes. Uncover and move the chicken to the low side of the grill, skin-side up. Cover and cook until the thighs reach an internal temperature of 160 degrees F, 15 to 20 minutes. Pour half the Blackberry BBQ Sauce into a medium bowl and use it to baste the chicken occasionally during the final 10 minutes of cooking.

Step 4

Remove the chicken from the grill. Serve with the remaining sauce on the side.

Step 5

In a large saucepan, combine the blackberries, beer, vinegars, sugar, onion, garlic, habanero, chipotle powder, coffee, coriander and cumin. Cook over medium-low heat, stirring occasionally, for 2 hours. Carefully puree the sauce in a blender or food processor, then strain.