Begin by preparing the ingredients. Cut the beef stew meat into bite-sized cubes if not pre-cut, and halve the baby potatoes.
In a large mixing bowl, combine the cubed beef, halved potatoes, minced garlic, Worcestershire sauce, dried thyme, paprika, salt, and black pepper. Mix until everything is evenly coated.
In a small saucepan over low heat, melt the unsalted butter. Once melted, pour the garlic butter over the beef and potatoes mixture, stirring to combine.
Transfer the mixture into the slow cooker. Spread it out evenly.
Cover the slow cooker with a lid and set it to cook on low for 6 hours or until the beef is tender and the potatoes are cooked through.
Once cooked, carefully stir the mixture and check for seasoning. Adjust salt and pepper as needed.
Serve hot, garnished with freshly chopped parsley.