Place the beef chunks, chopped bacon, carrots, onion, mushrooms, and garlic into the slow cooker.
In a small bowl, whisk together the red wine, beef broth, tomato paste, thyme, bay leaves, salt, and pepper.
Pour the liquid mixture over the beef and vegetables in the slow cooker. Stir gently to combine.
Cover and cook on low for 8 hours until the beef is fork-tender.
About 20 minutes before serving, cook the egg noodles in a pot of boiling water according to package directions.
Drain the noodles and return them to the pot. Add the butter and stir until melted and evenly coated.
Remove the bay leaves from the slow cooker. Spoon the beef bourguignon over the buttered noodles.
Sprinkle with fresh parsley before serving.