Add tamarind paste, chili paste, brown sugar, Worcestershire sauce, kecap manis, and sweet chili sauce; stir until slightly thickened. Transfer the sauce to the slow cooker.
1 teaspoon tamarind paste, 1 teaspoon chili paste, 4 tablespoon dark brown sugar, ½ teaspoon Worcestershire sauce, 1 tablespoon Kecap Manis, 2 tablespoons sweet chili sauce
Add beef and beef stock; mix well.
⅔ cup beef stock, 2 pounds chuck roast
Set the slow cooker to low and cook for 6–8 hours.
Shred beef with two forks and mix with the sauce.
Serve hot with rice, noodles, or buns.
NOTES
1. Can I make this spicier? Yes! Add extra sambal or a chopped red chili.2. Can I use chicken instead of beef? Yes, boneless chicken thighs also work beautifully with this sauce.3. Do I need to sear the beef first? No, it’s optional - the long, slow cooking gives plenty of flavor.4. Larger portion? With almost all recipes, you can then press the 2× button, but not with a slow cooker recipe. If you double the weight in meat, add ¼ to ⅓ cup (50 to 100 ml) of extra beef stock.5. Storage
Fridge: Store in an airtight container for up to 2 days.
Freezer: Freeze for up to 3 months. Thaw in the fridge overnight.
Reheat: Heat gently in a pan over medium heat until hot, stirring occasionally.