Slow Cooker Beef Stroganoff Prep Time: 20 minutes Cook Time: 4 hrs & 15 mins Servings: 4 Share: PRINT EMAIL PDF Pinterest This Recipe Calls For Cheese Sauces Classic Alfredo Sauce Shop Now Chunky Sauces Sautéed Onion & Garlic Sauce Shop Now Previous Next Ingredients 2 lbs boneless beef chuck steak cut into 1-1/2-inch pieces 2 Tbsp butter divided 1 package (10 oz.) white button mushrooms sliced 1 medium onion chopped 2 cloves garlic 1 jar RAGÚ® Classic Alfredo Sauce 1/2 cup sour cream Instructions Season beef, if desired, with salt and ground black pepper. Heat 1 tablespoon butter in 12-inch skillet over medium-high heat and brown 1/2 of the beef, stirring occasionally, about 4 minutes. Remove browned beef to slow cooker with slotted spoon, then repeat with remaining beef. Melt remaining 1 tablespoon butter in same skillet over medium heat and cook mushrooms and onion, stirring occasionally, until golden, about 6 minutes. Add garlic and cook, stirring frequently, 30 seconds. Remove to slow cooker. Stir in sauce. Cook covered at HIGH 4 to 5 hours or at LOW 8 to 10 hours or until beef is tender. Stir in sour cream. Serve, if desired, over hot cooked egg noodles.