Preheat the oven to 350°F (175°C). Cut any large apple slices in the apple pie filling into bite-size pieces so they distribute evenly throughout the baked beans.
1 (21 oz / 595 g) apple pie filling
Cook the bacon in a 12-inch (30 cm) cast-iron skillet over medium heat for 8 to 10 minutes, stirring occasionally, until the fat has rendered and the bacon is browned.
12 oz (340 g) bacon
Using a slotted spoon, transfer the bacon to a plate. Carefully pour off the excess bacon fat, leaving about 2 tablespoons (30 ml) in the skillet.
Add the onion and cook over medium heat for 5 to 7 minutes, stirring occasionally, until softened and lightly browned. Scrape up the browned bacon bits from the bottom of the skillet as the onion cooks.
1 medium yellow onion
Add the all-purpose seasoning rub and cayenne pepper. Cook for 30 seconds, stirring constantly, until fragrant.
1 tbsp (12 g) all-purpose seasoning rub, ¼ tsp (0.5 g) cayenne pepper
Stir in the barbecue sauce, yellow mustard, Worcestershire sauce and 1 tablespoon (15 ml) of the apple cider vinegar.
½ cup (120 ml) smoky barbecue sauce, 2 tbsps (30 ml) yellow mustard, 1 tbsp (15 ml) Worcestershire sauce, 2 tbsps (30 ml) apple cider vinegar
Add the undrained baked beans, apple pie filling and cooked bacon. Fold until the apples, bacon and beans are evenly distributed without breaking up the beans or apple pieces.
2 (28 oz / 1.59 kg total) cans original baked beans
Transfer the uncovered cast-iron skillet to the oven. If using a skillet that is not oven-safe, transfer the bean mixture to a 9 x 13-inch (23 x 33 cm) baking dish and bake uncovered.
Bake for 45 to 55 minutes, until the sauce has reduced and thickened and the mixture is bubbling around the perimeter. The sauce should still look slightly loose when it comes out of the oven because it will continue to thicken as the beans rest.
Remove from the oven and stir in the remaining 1 tablespoon (15 ml) apple cider vinegar. Taste before adding salt, since the bacon, seasoning rub, baked beans, barbecue sauce and Worcestershire sauce already contain salt.
salt
Let the baked beans rest for 10 minutes before serving to allow the sauce to thicken further.