Walnut Maple Roasted Sweet Potatoes Recipe

Ingredients

• 3 mediumsweet potatoes
• 76 g (⅓ cup)melted unsalted butter
• 1½ teaspoonscinnamon
• ½ teaspoonsalt
• ½ teaspoonpepper
• 80 ml (⅓ cup), plus 30 ml (2 tablespoons) extramaple syrup
• 1 teaspoonthyme
• 40 g (⅓ cup)chopped walnuts

Instructions

1. 1

   Preheat the oven

   Heat the oven to 200 °C (400 °F) so it is ready for roasting.

2. 2

   Prepare the potatoes

   Wash and peel the sweet potatoes, then cut them into evenly sized cubes of about 2.5 cm (1 inch).

3. 3

   Mix the coating

   In a large bowl, whisk together the melted butter, cinnamon, salt, pepper, 80 ml (⅓ cup) of maple syrup and thyme until combined.

4. 4

   Coat the potatoes

   Add the sweet potato cubes and toss until they are covered evenly in the maple-butter mixture.

5. 5

   Roast until tender

   Arrange the potatoes in a single layer on a baking sheet lined with parchment paper or a silicone mat. Roast for 25–30 minutes, stirring halfway through, until browned and tender.

6. 6

   Add walnuts and syrup

   Five minutes before the end of roasting, scatter the walnuts over the potatoes and drizzle with the remaining 30 ml (2 tablespoons) of maple syrup. Return the tray to the oven so the walnuts toast lightly and the syrup glazes the potatoes.

7. 7

   Serve warm

   Remove the tray when the sweet potatoes are tender and the walnuts are toasted, then serve warm.

What are maple roasted sweet potatoes?

This American-style side dish turns sweet potatoes into tender, caramelised cubes with a sweet-and-savoury coating. Sweet potato sides are common in American home cooking, particularly at autumn and holiday meals.

Here, cinnamon and maple syrup bring warmth and sweetness, while thyme, pepper and walnuts add savoury and earthy notes. The walnuts go on near the end so they toast without spending the full roasting time in the oven.

Nutrition and macros by portion

The nutrition label shows one serving as written: 430 calories, 5g protein, 65g carbs, 18g fat.

Most of the carbohydrates come from the sweet potatoes and maple syrup, while butter and walnuts contribute much of the fat. The walnuts provide some protein, though this side is not a major protein source; serve it with a protein-rich main and vegetables for a more balanced plate.

Choosing and cutting the potatoes

Uniform cubes: Cut the potatoes into pieces about 2.5 cm (1 inch) across. Similar-sized pieces are more likely to become tender at the same time.

Peeling: The method calls for peeled sweet potatoes, which gives the finished cubes a soft, even surface for the maple-butter coating to cling to.

Getting an even coating

Whisk first: Combine the melted butter, maple syrup, spices and thyme before adding the potatoes. This helps distribute the seasoning across the tray rather than leaving some pieces heavily coated and others bare.

Toss thoroughly: Turn the cubes in the bowl until each one is coated, then spread them out in a single layer. Use a large enough tray to avoid crowding.

Roasting for tender centres

High heat: At 200 °C (400 °F), the pieces can soften while their surfaces brown. Stir them once halfway through the 25–30-minute roasting time to encourage even cooking.

Doneness: Check a few of the largest cubes with a knife or fork. They should be tender in the centre, with some browning on the outside.

Finishing with walnuts

Late addition: Add the chopped walnuts and extra maple syrup five minutes before the potatoes are done. This gives the nuts time to toast lightly and the syrup time to glaze the potatoes without roasting the walnuts for too long.

Watch the finish: The syrup can darken quickly, so check the tray as it approaches the end of cooking and take it out once the potatoes are tender and the walnuts are lightly toasted.

Serving suggestions

As a side: Serve the potatoes warm alongside roast chicken, pork or a hearty bean dish. Their sweet, spiced coating also works well with simply cooked greens.

For a fuller plate: Add a protein-rich main and a green vegetable or salad to balance the sweet potato and maple flavours.

Recipe notes & tips

• Line the baking sheet with parchment paper or a silicone mat to help prevent sticking.
• Keep the potato cubes similar in size so they roast at a similar rate.
• Spread the cubes out rather than piling them up, which helps them brown.
• Stir the potatoes once halfway through roasting, as directed.
• Add the walnuts and extra maple syrup only for the final five minutes.
• Check the largest cubes for tenderness before taking the tray out.

Variations

• Add sage: Swap the thyme for sage for a different savoury, autumnal note.
• Use pecans: Replace the walnuts with chopped pecans and add them at the same time.
• Add chilli: Include a pinch of chilli flakes in the coating for gentle heat.
• Try smoked paprika: Add a little smoked paprika to give the seasoning a deeper savoury flavour.
• Make it dairy-free: Use a plant-based butter alternative in place of the unsalted butter.

Common mistakes to avoid

• Uneven cubes: Pieces cook at different speeds; cut them to a similar size.
• Crowded tray: The potatoes may soften without browning; arrange them in a single layer.
• Skipping the stir: Some sides can brown faster; turn the cubes halfway through.
• Walnuts in too early: They may over-toast; add them for only the final five minutes.
• Relying only on the timer: Larger cubes may need more time; check tenderness with a knife.

How to store

Cool leftovers and refrigerate them in an airtight container for up to 3 days. Reheat in an oven at 180 °C until hot, or warm them in a frying pan; the walnuts may soften during storage.

Frequently asked questions