Add the butter and flour, and cook until the mix thickens. Then add the beef broth, wine and the pieces of beef.
Continue cooking on high heat until the sauce begins to thicken, then add the thyme and bay leaves. Cover the pan and simmer on medium heat for 2½ hours, stirring every 30 minutes.
Add the chunks of chocolate and carrots. Season with salt and pepper, and cook for another 30 minutes.
Recipe by Cooking TV Recipes at https://cookingtv-channel.com/beef-bourguignon/