Slow Cooked Rack of Lamb with Rosemary Mash & Green Beans

Cooked rack of lamb and green beans on large white bowl and two forks, two small pots of sauce and salt.
There will be people out there that say you can’t cook rack of lamb in the slow cooker. Well, they need to try this recipe! This NZ rack of lamb recipe is worthy of a dinner party. The roasting piece I’ve chosen for this particular slow cooker recipe is a lamb rack, which worked brilliantly because it was partially sliced between each rib and this allowed the flavours to penetrate the lamb rack. So if you’re using another cut of lamb, I suggest you score it well with a sharp knife to allow the flavours in.

Prep Time 25 minutes
Cook Time 8 hours
Total Time 8 hours 25 minutes
Course Dinner
Servings 6 people


  • 2 lamb racks
  • 1 cup plum sauce or jam
  • 1 tbsp of tomato sauce we love Chantal Organics
  • 1 lemon cut into slices
  • 1 tbsp red wine vinegar
  • 1 tsp grated ginger
  • 1 tsp sweet chilli sauce
  • 2-3 sprigs rosemary we love Superb Herb

for the gravy

  • 2 tsp cornflour

For the rosemary mash

  • 1.5 kg potatoes quartered and cooked until tender
  • ¾ cup milk
  • 80 g butter cubed
  • 1 tsp salt plus extra for seasoning
  • ½ tsp black ground pepper
  • 1 sprig rosemary chopped
  • For the steamed beans

serve with

  • A handful of green beans steamed until just tender


  • Lamb Racks
  • Put both the lack racks into the slow cooker and turn on low.
  • Combine all other ingredients and pour over the meat.
  • Cook on low for about 8 hours (or about 4 hours on high if you’re out of time).
  • Once cooked carve up each rack.
  • For the gravy
  • Once lamb is removed, drain out some liquid from the slow cooker and put in a saucepan and bring to the boil.
  • In a cup, add about 2 teaspoons of cornflour to enough water to make a paste and add to the saucepan whilst stirring. This will make the sauce thicken and in doing so will separate off the oil. Pour any oil off and use the sauce with the rack of lamb – delicious!
  • For the rosemary mash
  • Place the milk, butter and rosemary in a small saucepan and bring to a gentle simmer.
  • Put the cooked potatoes, and rosemary milk mixture in a large bowl and mash until smooth. Season with salt and pepper.
  • To serve
  • Spoon the mashed potatoes onto a large beautiful serving platter. Top with steamed green beans, slow cooked lamb racks and a drizzle of gravy.
  • Devour while hot!

Keyword gluten free
Tried this recipe?Let us know how it was!

1 Comment

  1. Sura on 26/06/2022 at 9:07 am

    Nice flavour ,I like the untraditional ingredients ,well cooked with a slight hint of spicy sweet sour flavours

Leave a Comment

Recipe Rating

This site uses Akismet to reduce spam. Learn how your comment data is processed.