Thai Red Curry Sweet Potato Burgers with Coconut-Peanut Sauce

Oven-roasted sweet potato and chickpeas are mashed with red curry paste, Thai basil, ginger and lime, then baked into sturdy, lightly crisp patties. Piled on toasted buns with a creamy coconut-peanut sauce and crunchy cucumber and carrot, they are sweet, spicy and fresh.

Prep
58 min
Cook
53 min
Wait
45 min
Total
2 hr 36 min
Makes
6 burgers
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Steps

Before you start
  • Shake the can of coconut milk well before opening so the cream and liquid are blended.
  • Check your red curry paste: brands vary a lot in heat. Use 2 tablespoons for mild and 3 for medium-spicy.
  • Plan on about 2½ hours in total. The chilling step is essential, because the patties will be too soft to shape and flip without it.
  • Have two large rimmed baking sheets and parchment paper ready.
  1. Roast the sweet potatoesOven 425°F / 220°C

    • Position a rack in the center of the oven and heat to 425°F (220°C).
    • Toss the sweet potato cubes with 1 tablespoon (15 ml) of the oil on a large rimmed baking sheet and spread in a single layer with space between the pieces.
    • Roast for 25 minutes, stirring once halfway, until the cubes are completely tender, the edges are browned in spots and a knife slides in with no resistance.
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    Ready when: Cubes are very tender with browned edges and look slightly wrinkled

    Tip: Don't crowd the pan. Steamed sweet potatoes hold too much water and make soft patties.

  2. Cool the potatoes

    • Leave the sweet potatoes on the pan for 15 minutes so steam escapes.
    • Leave the oven on.
    • Slide the potatoes into a large mixing bowl once they are just warm, not hot.
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    Ready when: Potatoes are warm to the touch but no longer steaming

    Tip: Hot potatoes would start to cook the chickpea flour and make the mix gummy.

  3. Prep the flavorings

    • While the potatoes cool, finely chop the Thai basil, thinly slice the scallions, grate the garlic and ginger, and zest the lime (about 1 teaspoon).
    • Squeeze the zested lime and measure 2 tablespoons (30 ml) of juice: 1 tablespoon goes in the patties and 1 tablespoon in the sauce.
    • Pat the rinsed chickpeas very dry with a clean towel.
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    Ready when: Herbs are finely chopped and chickpeas feel dry to the touch

    Tip: Dry chickpeas mash into a thick paste instead of a watery one.

  4. Mash the burger base

    • Add the chickpeas to the bowl with the sweet potatoes.
    • Mash with a potato masher until mostly smooth but with some chickpea pieces still visible, about 2 minutes.
    • Stir in the curry paste, 3 tablespoons (45 ml) coconut milk, basil, scallions, garlic, ginger, lime zest, 1 tablespoon lime juice, 1 tablespoon soy sauce and the salt until evenly orange-red.
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    Ready when: Mixture is evenly colored with no streaks of curry paste

    Tip: Leave a few chunks of chickpea for texture; over-mashing gives a baby-food consistency.

  5. Add flour and chill

    • Stir in the chickpea flour and panko until no dry spots remain.
    • The mixture will be soft and slightly sticky.
    • Cover the bowl and refrigerate for 30 minutes so the flour hydrates and the mixture firms up.
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    Ready when: Mixture holds its shape when pressed into a ball

    Tip: If it still feels very wet after chilling, stir in 1 more tablespoon of chickpea flour.

  6. Make the sauce

    • In a small bowl, whisk the peanut butter, 3 tablespoons (45 ml) coconut milk, 1 tablespoon lime juice, maple syrup, 1 teaspoon soy sauce and sriracha (if using) until smooth and pourable like thick cream.
    • If it is too thick, whisk in warm water 1 teaspoon at a time.
    • Taste and add more lime or sriracha if you like.
    • Refrigerate until serving.
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    Ready when: Sauce is smooth and drizzles off the whisk in a ribbon

    Tip: Cold peanut butter clumps; bring it to room temperature first so the sauce whisks smooth.

  7. Shape the patties

    • Line two large baking sheets with parchment and brush each with ½ tablespoon of the remaining oil.
    • With wet hands, divide the mixture into 6 portions of about 175 g (⅔ cup) each.
    • Pat each into a patty about 4 inches (10 cm) wide and ¾ inch (2 cm) thick and set 3 on each sheet, leaving space between them.
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    Ready when: Patties are even in thickness and hold together when lifted

    Tip: Re-wet your hands often; the mixture sticks to dry hands.

  8. Bake the first sideOven 425°F / 220°C

    • Bake the patties at 425°F (220°C) for 15 minutes, with one sheet on the center rack and the other on the upper rack; swap their positions halfway through for even browning.
    • The tops should look set and dry and the undersides lightly browned.
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    Ready when: Tops look dry and the edges lift easily from the parchment

    Tip: Don't flip early. Patties that release easily from the parchment are ready.

  9. Flip and finishOven 425°F / 220°C

    • Slide a wide spatula fully under each patty and flip gently.
    • Bake another 13 minutes at 425°F (220°C), until both sides are browned and crisp at the edges and the centers feel firm when pressed.
    • Let the patties rest on the pan for 5 minutes while you prepare the buns.
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    Ready when: Deep golden-orange crust, firm to the touch, slightly springy in the center

    Tip: They firm up more as they cool, so resting prevents breakage when you build the burgers.

  10. Toast buns and assemble

    • Heat a large skillet over medium heat and toast the cut sides of the buns for 1–2 minutes until golden.
    • Spread the bottom buns with a spoonful of sauce, then layer a lettuce leaf, a patty, grated carrot, cucumber ribbons and cilantro.
    • Drizzle with more sauce, add the top bun and serve right away.
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    Ready when: Bun cut sides are golden brown

    Tip: The lettuce leaf acts as a barrier so the bottom bun doesn't get soggy.

Good to know

Tips
  • Roast the potatoes until the edges brown. This drives off moisture, which is the key to patties that hold together.
  • Check your curry paste label: some brands contain shrimp paste. Choose a vegan paste if you need these to be fully vegan.
  • Use a wide, thin spatula and flip patties in one confident motion; they are tender until they cool.
  • For extra crunch, broil the finished patties 1–2 minutes on high, watching closely so the curry paste doesn't burn.
Make ahead

Shape the patties up to 1 day ahead, place on parchment-lined sheets, cover tightly and refrigerate; add 2–3 minutes to the first bake. The sauce keeps for 3 days in the refrigerator.

Storage & reheating

Cooked patties keep in an airtight container in the refrigerator for up to 4 days, with parchment between layers. Don't leave them at room temperature more than 2 hours. Freeze cooled patties on a tray, then bag them, for up to 3 months. Reheat from the fridge or frozen on a baking sheet at 375°F (190°C) for 12–15 minutes (about 20 minutes from frozen), flipping once, until hot throughout and crisp. Store sauce separately in the refrigerator for up to 3 days.

Substitutions
  • chickpea flour (besan) → Oat flour or all-purpose flour, same amount. Patties will be slightly softer; use oat flour and gluten-free panko for a gluten-free version.
  • panko breadcrumbs → Gluten-free panko or rolled oats pulsed briefly. Use the same weight; oats give a slightly denser patty.
  • creamy peanut butter → Almond butter or sunflower seed butter. Use the same amount; the flavor is a bit milder. Sunflower butter is nut-free.
  • fresh Thai basil leaves (or sweet basil) → Sweet Italian basil with a few mint leaves. You'll lose some of the anise note, but the patties will still taste fresh and herby.

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Meal
Dinner
Cuisine
Thai
Quick & Easy
Make Ahead

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