4 teaspoons vegetable bouillon base (such as Better Than Bouillon® Vegetable Base)
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1 (7 ounce) can chipotle peppers in adobo sauce, chopped, sauce reserved
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2 teaspoons liquid mesquite smoke flavoring
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2 teaspoons ground cumin
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½ teaspoon ground black pepper
Instructions
Heat the olive oil and balsamic vinegar in a skillet; cook and stir the orange bell pepper, celery, carrot, onion, and garlic in the hot oil until the onion is translucent, 5 to 8 minutes. Transfer the mixture to a slow cooker; mix in the black-eyed peas, water, and vegetable base, stirring to dissolve the vegetable base. Stir in the chipotle peppers, about 1 tablespoon of the reserved adobo sauce (or to taste), liquid smoke, cumin, and black pepper.
Cook in the slow cooker on Low until the black-eyed peas are very tender and the flavors are blended, about 8 hours.