Recipes - Kansas City-Style Blueberry BBQ Sauce

Ingredients

• 1/4 cup unsalted butter
• 2 cups white onion
• 2 teaspoons ground black pepper
• 1 3/4 tablespoons kosher salt
• 1 1/2 cups canned blueberries, drained
• 2 tablespoons finely minced garlic
• 2/3 cups molasses
• 4 cups ketchup
• 1/4 cup yellow mustard
• 2/3 cup dark brown sugar
• 1/2 teaspoon cayenne pepper
• 1 tablespoon chili powder
• 2/3 cup apple cider vinegar