Traditionally, potato gratin is enriched with butter and cream, but this gluten- and dairy-free version delivers the same rich, comforting texture without dairy. Thinly sliced potatoes are layered in a silky, savory coconut-based sauce flavored with shallot, garlic, fresh thyme and a hint of nutmeg. The result is tender, creamy interior slices with crisp, golden edges—a lighter take on classic comfort food that still feels indulgent. Guests will be pleasantly surprised that this decadent dish is completely dairy free.
Before you begin, a few practical tips will help you achieve the ideal balance of creaminess and crunch.
- Use a mandolin to slice the potatoes paper-thin so the edges crisp evenly. Uniform slices stack neatly and cook through at the same rate.
- Prevent lumps by whisking the tapioca flour into 1/4 cup of the hot sauce to make a smooth paste before adding it back to the saucepan.
- Seal the baking tray tightly with baking paper and foil during the covered stage to trap steam. The trapped steam softens the potatoes and ensures a tender, evenly cooked gratin.
- For an extra caramelized top, finish the gratin under a hot grill for about five minutes.
- Let the gratin rest for 10 minutes after baking so the sauce sets and the slices absorb the flavor.
- To make this vegan, substitute vegetable stock for the chicken stock.
Once you’ve mastered the basic gratin, experiment with additions: crisp bacon or pancetta, thin onion rings, or sautéed leeks work wonderfully between the potato layers. Herbs, grated vegan cheese substitutes or a scattering of toasted breadcrumbs can also add texture and flavor. Enjoy crafting your version of this satisfying, dairy-free classic.
- 1 kg unpeeled white potatoes, thinly sliced on a mandolin
- 1 tablespoon extra virgin olive oil
- 1 large shallot, finely grated
- 2 garlic cloves, finely grated
- 2 teaspoons fresh thyme, plus extra to sprinkle
- 2 teaspoons nutritional yeast
- 1/2 teaspoon freshly grated nutmeg
- 400 ml coconut cream
- 250 ml chicken stock (or vegetable stock for vegan)
- 2 tablespoons tapioca flour
- Sea salt flakes and freshly cracked black pepper
- Preheat a fan-forced oven to 200°C and grease a 20 x 25 cm rectangular baking tray.
- Heat the olive oil in a medium saucepan, add the grated shallot and a generous pinch of salt. Sauté until softened, then add the garlic, thyme, nutritional yeast and nutmeg and cook for about 30 seconds until fragrant.
- Pour in the coconut cream and stock, bring to a gentle simmer and cook uncovered for 10 minutes to reduce slightly. In a small bowl, whisk the tapioca flour into 1/4 cup of the simmering sauce to make a smooth paste, then stir this back into the saucepan and simmer for an additional minute to thicken. Remove from heat, taste and adjust salt if needed.
- Arrange the potato slices in vertical rows in the prepared tray. Pour the hot creamy sauce evenly over the potatoes and season with cracked pepper and extra thyme leaves. Cover tightly with baking paper and aluminum foil and bake for 1 hour. Remove the foil and bake uncovered for another 20 minutes. For a deeply golden, crispy top, place under a hot grill for 5 minutes. Let rest for 10 minutes before slicing and serving.