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Dinner · Part 2 of 3: Instructions

Garlic Butter Golden Korma Lamb Cubes: One-Pot Slow Cooker Step-by-step instructions

Slow cooker garlic butter golden korma lamb cubes in a black ceramic pot with sauce
Prep
Cook
Total
Serves
6

Before you start

Before you start, make sure you have all the ingredients measured and ready. Cut the lamb into 1-inch cubes if not already done. Dice the sweet onions into small, even pieces. If using store-bought garlic herb butter, let it soften slightly so it can be cut into medallions.

Have your slow cooker clean and ready. There is no need to preheat the slow cooker; just add the ingredients as directed. This recipe is truly dump-and-go, so no advanced preparation is required beyond the initial chopping and measuring.

Ingredients at a glance (5)
  • 2 lb cubed lamb shoulder
  • 1 1/2 cups turmeric-cardamom korma sauce
  • 1 cup diced sweet onions
  • 1/2 cup thick Greek yogurt
  • 4 tbsp roasted garlic herb butter, cut into medallions

Instructions

Layer the Base

  1. Layer the Lamb
    Place the cubed lamb shoulder directly into the slow cooker basin, spreading it into an even layer. There is no need to brown the meat first; the long, slow cooking will create deep flavor and tender texture.
    Look for The lamb should cover the bottom of the slow cooker in a single layer.
    Tip Pat the lamb dry with paper towels before adding to the slow cooker for better sauce texture.
  2. Add the Sauce and Onions
    Pour the turmeric-cardamom korma sauce evenly over the lamb. Scatter the diced sweet onions on top, making sure they are distributed across the surface.
    Look for The sauce should coat most of the lamb, with onions scattered evenly.
    Tip Use a spatula to gently spread the sauce without stirring the meat too much.

At the end of this phase, the slow cooker contains a layer of raw lamb cubes topped with the korma sauce and diced onions. The sauce should be evenly distributed, and the onions should be visible on top. The raw lamb should be covered with sauce to ensure even cooking. This is the foundation of the dish, and the layers will meld together as they cook.

Slow Cook and Transform

  1. Top with Yogurt and Butter
    Dollop the thick Greek yogurt over the sauce and onions. Place the roasted garlic herb butter medallions on top, spacing them out so they melt evenly during cooking.
    Look for The yogurt forms white dollops and the butter medallions sit on the surface.
    Tip Do not stir after adding the yogurt and butter; they will meld into the sauce as it cooks.
  2. Cover and Cook Low and Slow
    Cover the slow cooker with the lid and cook on LOW for 8 to 10 hours, or on HIGH for 4 to 5 hours, until the lamb is fork-tender and easily pulls apart. The sauce will bubble gently and thicken. Let it rest for 3 minutes before slicing.
    Look for The sauce is gently bubbling and the lamb is tender enough to shred with a fork.
    Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
    Tip Resist the urge to lift the lid during cooking; each peek releases valuable heat and extends cooking time.

After hours of gentle cooking, the slow cooker is filled with a bubbling, fragrant curry. The lamb is tender and easily pierced with a fork, and the sauce has thickened to a rich, golden consistency.

The yogurt and butter have melted into the sauce, creating a silky texture. The aromas of turmeric, cardamom, garlic, and herbs fill the kitchen. The curry is ready to be served.

Serve and Savor

  1. Check the Lamb's Temperature
    Before serving, check that the lamb has reached a safe internal temperature of 145°F (63°C) using an instant-read thermometer. Because it has cooked low and slow, it will be well past this point, but it is important to verify.
    Look for The thermometer reads at least 145°F (63°C) when inserted into the thickest cube.
    Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
    Tip Let the lamb rest for 3 minutes before serving to allow the juices to redistribute.
  2. Serve Over Rice with Naan
    Spoon the steaming curry over fluffy basmati rice and serve with warm garlic naan on the side. Ladle extra sauce over each portion.
    Look for The curry is bubbling and fragrant, with tender lamb cubes glistening in the golden sauce.
    Tip Warm the naan in the oven or a dry skillet just before serving.

The curry is ladled over fluffy basmati rice, with warm naan on the side. The lamb cubes are glistening with sauce, and the gravy is thick and aromatic. The dish looks and smells irresistible, with the golden hue of turmeric and the richness of butter. Each spoonful delivers tender meat and a burst of complex spices. The meal is complete and satisfying.

Common mistakes

One common mistake is lifting the lid to check on the food, which releases heat and extends the cooking time. Trust the recipe and keep the lid on until the end. Another mistake is using lean lamb that can dry out; always choose well-marbled shoulder.

Overcooking on high can also lead to dry meat—low and slow is key. Finally, adding the yogurt too early or stirring it in vigorously can cause curdling; gently dollop it on top and let the heat do the work.

How to tell it’s done

The lamb is done when it is fork-tender and easily pulls apart with minimal pressure. The sauce should be thick and glossy, with the yogurt and butter fully incorporated. To ensure safety, insert an instant-read thermometer into the thickest piece of lamb; it should read at least 145°F (63°C).

After cooking, let the lamb rest for 3 minutes before serving to allow the juices to redistribute. The curry should be bubbling and fragrant, with the meat falling apart at the touch of a spoon.

  • Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest

Coming up in Part 3: common questions

  • Can this recipe be made in an Instant Pot?
  • Why does the yogurt sometimes curdle?
  • Can this recipe be doubled?
  • How do you thicken the sauce?
  • What sides go well with this curry?

Also in Part 3: variations (Chicken Korma, Vegetable Korma, Spicy Korma, Creamy Coconut Korma), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

4 variations · storage & make-ahead · 5 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)