Kansas City-Style Barbecue Sauce

Ingredients

• 2 tablespoons butter
• 1 small yellow onion, finely chopped
• 3 cloves garlic, minced
• 2 cups ketchup
• 1/3 cup molasses
• 1/3 cup dark brown sugar
• 1/3 cup apple cider vinegar
• 2 tablespoon yellow mustard
• 1 tablespoon chili powder
• 1 teaspoon freshly ground black pepper
• 1/2 teaspoon cayenne pepper

Directions

1. Melt the butter in a medium saucepan set over medium heat. Stir in the onion and cook until it has softened, about 5 minutes. Add the garlic and cook just until it smells fragrant, about 30 seconds.
2. Add the ketchup, molasses, brown sugar, vinegar, mustard, chili powder, black pepper, and cayenne pepper, then stir everything together. Bring the sauce to a boil, lower the heat, and simmer on low until it thickens slightly, about 30 minutes, stirring often.
3. Pour the sauce into the jar of a blender and blend until smooth. Cool it to room temperature, then move it into a jar and refrigerate for up to a month.