Step 1: Season the Beef - Add the beef stew meat to the bowl of your slow cooker. Sprinkle the paprika, salt, and black pepper over the beef, then give everything a gentle stir so the seasoning reaches most of the pieces. Do not worry about coating every single corner perfectly. The slow cooker gives those seasonings plenty of time to settle into the beef, and the sauce will bring everything together as it cooks.
Step 2: Add the Onion and Garlic - Scatter the diced onion and minced garlic over the seasoned beef. I like to tuck a few onion pieces down between the beef so they soften into the cooking juices instead of sitting in one little pile on top. As the day goes on, the onion becomes tender and sweet, while the garlic adds that warm kitchen smell that makes people wander in and ask what is cooking.
Step 3: Whisk the Savory Sauce - In a medium bowl, whisk together the cream of mushroom soup, beef broth, and Worcestershire sauce until the mixture is smooth. Take a moment to scrape around the edges of the bowl so there are no thick clumps of soup left behind. Pour the sauce over the beef, onion, and garlic. It may not look like a lot of liquid at first, but the beef releases juices as it cooks, and everything becomes beautifully saucy by the end.
Step 4: Cook Until the Beef Is Tender - Cover the slow cooker and cook on high for 3 to 4 hours or on low for 6 to 8 hours. The low setting is especially nice when you are starting dinner in the morning and want to come home to that cozy smell already waiting for you. The beef is ready when it feels tender when pressed with a fork and starts to pull apart easily. If it still seems firm, give it a little more time. Tough beef usually needs patience, not more stirring.
Step 5: Stir in the Creamy Finish - About one hour before serving, add the cream cheese and sour cream to the slow cooker. Cut the cream cheese into a few chunks first if it is coming straight from the refrigerator, because smaller pieces melt more easily. Stir gently until the cream cheese begins to soften into the sauce, then cover and let it continue cooking for the rest of the hour. When you come back, stir well until the sauce is creamy, smooth, and rich.
Step 6: Cook the Egg Noodles - Near the end of the cooking time, bring a large pot of salted water to a boil and cook your egg noodles according to the package directions. I usually use about three fourths of a standard package, but you can use more or less depending on how noodle heavy your family likes their bowls. Cook them until just tender, then drain them well. You want them soft enough to enjoy but not overly soft, since they will keep absorbing sauce once they meet the beef.
Step 7: Fold Everything Together - Add the drained egg noodles to the slow cooker and fold them gently into the creamy beef mixture. Use a large spoon and take your time so you do not break up the tender beef too much. Let the noodles sit in the sauce for a few minutes before serving. That little pause helps them soak up all that creamy goodness and gives you a chance to set the table, pour drinks, or call everybody in.
Step 8: Finish with Fresh Parsley - Spoon the creamy beef and noodles into bowls, then finish each serving with fresh chopped parsley. It is a small thing, but that bit of green makes the whole meal feel brighter and more welcoming. Set the pot in the middle of the table if your family likes seconds, because this is one of those dinners where somebody will probably be scraping the last little bit of sauce from the bottom.