Creating Slow Cooker Pineapple Beef Tacos involves straightforward steps to ensure success:

1. Prepare the Beef: Trim any excess fat from the beef chuck roast. Cut it into large chunks for more even cooking.
2. Make Marinade: In a bowl, combine pineapple juice, soy sauce, brown sugar, minced garlic, cumin, chili powder, black pepper, and salt. Mix well.
3. Add Ingredients to Slow Cooker: Place the beef chunks in the slow cooker. Pour the marinade over the beef, ensuring it’s well coated.
4. Add Pineapple: Scatter the diced pineapple over the beef.
5. Set Cook Time: Cover the slow cooker and set it to low for 6-8 hours or high for 3-4 hours. The beef should become tender and easy to shred.
6. Shred Beef: Once cooking time is complete, remove the beef from the slow cooker and shred it using two forks. Return the shredded beef to the slow cooker, mixing it into the sauce.
7. Serve: Warm taco shells or tortillas in a separate pan or microwave. Fill each shell with shredded beef, topped with your choice of garnishes like cilantro and diced onions. Serve with lime wedges on the side for a zesty kick.

These steps will guide you to delicious and juicy tacos that will please everyone!