Apple Butter-Bourbon Sauce

2 tablespoons butter
1 onion, chopped
1/8 teaspoon crushed red pepper flakes
1 cup unsweetened apple juice
2/3 cup Slow-Cooker Apple Butter or purchased apple butter
3 tablespoons apple cider vinegar
2 tablespoons Worcestershire sauce
2 tablespoons bourbon

Melt butter in a saucepan over medium heat. Add onion and red pepper flakes. Cook, stirring frequently, for 5 to 7 minutes or until onion is tender. Stir in juice, apple butter, vinegar, and Worcestershire. Bring mixture to a boil. Reduce heat to medium-low and simmer 30 minutes, stirring occasionally until thickened. Stir in bourbon and cook 5 minutes.
Recipe and photo provided by Apples: 50 Tried & True Recipes by Julia Rutland