In Papua New Guinea, kaukau (sweet potato) is a daily staple, often slow-roasted in an earth oven. This kitchen-friendly version keeps the simple island spirit of the dish but adds a bright coconut-lime drizzle to highlight the potato's natural sweetness.
Nutrition Facts
Per serving (estimated)
- 285 kcalCalories
- 12 gFat
- 9 gSaturated Fat
- 42 gCarbs
- 6 gFiber
- 13 gSugar
- 4 gProtein
- 610 mgSodium
- 720 mgPotassium
- 45 mgCalcium
- 1.6 mgIron
- 22 mgVitamin C
- 945 mcgVitamin A
Ingredients
For the sweet potatoes
- 4 medium sweet potatoes (about 1.5 lb / 680 g), scrubbed
- 2 tbsp coconut oil, melted
- 1 tsp fine sea salt
- 1/2 cup water, for the baking dish
For the coconut-lime drizzle
- 1/2 cup full-fat coconut cream
- 2 tbsp fresh lime juice (about 1 lime)
- 1 tsp finely grated lime zest
- 1/4 tsp red chili flakes (optional)
- 1/4 tsp fine sea salt
- 2 tbsp chopped fresh cilantro or flat-leaf parsley
- Flaky sea salt, to finish
Directions
- Preheat the oven to 400°F (200°C) and set a rack in the middle position. Pour the water into a small roasting pan or oven-safe dish.
- Pat the sweet potatoes completely dry, then pierce each one 6-8 times with a fork to allow steam to escape during baking.
- Rub the potatoes all over with melted coconut oil and sprinkle evenly with the fine sea salt, massaging the oil into the skin.
- Place the potatoes in the prepared pan, cover tightly with foil, and bake for 45 minutes. Remove the foil and bake 10-15 minutes more, until the skins are lightly blistered and a knife slides easily into the center.
- While the potatoes bake, make the drizzle: whisk the coconut cream, lime juice, lime zest, chili flakes, and salt in a small bowl until smooth. Warm gently in a saucepan over low heat for 2-3 minutes if you prefer a warm sauce.
- Transfer the baked potatoes to a serving plate and let them rest for 5 minutes so the steam settles and the inside turns fluffy.
- Slice each potato open lengthwise and gently press the ends to open them up, fluffing the flesh with a fork.
- Spoon the warm coconut-lime drizzle generously over each potato, letting it pool into the cracks. Top with chopped cilantro and a pinch of flaky sea salt before serving.
Cook’s Notes
- Choose sweet potatoes of similar size (about 6-8 oz each) so they finish baking at the same time.
- For an authentic mumu-style smoky note, char the finished potatoes directly over a gas burner flame for 1-2 minutes per side before opening them.
- White-fleshed sweet potatoes (sometimes labeled 'Jersey' or 'Hannah') are closer in flavor to traditional PNG varieties if you can find them.
- The coconut-lime drizzle keeps in a sealed jar in the refrigerator for up to 3 days – whisk before reusing and serve over grilled fish or roasted vegetables.
- Serve alongside grilled reef fish or chicken for a complete Papua New Guinean-style plate.
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Craving more flavors from Papua New Guinea? Try these traditional recipes:









