Easy Roasted Sweet Potato Cubes (Crispy Oven Recipe)
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Roasted sweet potato cubes have always been one of my favourite easy sides – I’ve made them so many times trying to get that perfect balance of crispy edges & soft creamy centres. With just a few simple spices and a hot oven, the natural sweetness caramelises and you get these golden, crispy bites. I promise once you’ve made these cubed sweet potatoes in oven a few times, you’ll keep coming back to them – especially if you serve them alongside this Easy Spicy Chicken Sandwich.
A Quick Look At The Recipe
- ✅ Recipe Name: Easy Roasted Sweet Potato Cubes (Crispy Oven Recipe)
- 🕦 Ready in: 35 minutes
- 🤝 Serves: 5
- 🍴 Calories: 328kcal
- 🧑🍳 Main ingredients: sweet potatoes, olive oil, smoked paprika, onion powder
- ✨ Summary: Easy roasted sweet potato cubes with crispy edges & soft centres. A simple oven recipe ready in just 30 minutes.
Why you’ll love this recipe
These cubed sweet potatoes roast quickly & evenly, making them one of the easiest oven side dishes when you need something super reliable.
- Quick & easy: My roasted sweet potato cubes only require a few ingredients and steps. You’ll need a few minutes for prep time, and then the potatoes can go right into the oven.
- Delicious: The spices we use for this recipe for roasted sweet potatoes really complement the sweetness of the potatoes. You could try this Homemade Nando’s Seasoning instead, too.
- Crispy: You’ll get deliciously crispy sweet potatoes instead of baked sweet potatoes, similar to my Super Crispy Ninja Airfryer Roast Potatoes. This recipe is also full of fibre, making it a healthy, filling side dish for mealtime.
Use leftover sweet potatoes to make other recipes like Crispy Roasted Sweet Potato Wedges, Halloumi and Sweet Potato Tex Mex Bowls, or Homemade Pan-fried Sweet Potato Gnocchi.
Table of Contents
Ingredients
- Sweet potatoes: Jewel, Garnet, or Japanese sweet potatoes are delicious, so try to use one of these varieties for the best results. Cutting the potatoes into evenly sized cubes (sometimes called diced sweet potatoes) helps them cook at the same rate and get crisp edges.
- Olive oil: For this sweet potato cubes oven recipe, you’ll need a neutral oil that can handle high heat. Avocado oil is also a great option as you can cook with it in hotter temps.
- Smoked paprika: I love using smoked paprika for roasted sweet potato cubes, which complements the sweet potato flavour well. However, you can also use spicy or sweet paprika if you prefer those flavours. It’d be perfect dipped into this Homemade Avocado Mayo.
See the recipe card for full information on ingredients and quantities.
Variations/ Adaptations
- Use them in tacos: These roasted sweet potato cubes make excellent tacos, similar to Loaded Veggie Tacos. Use the typical toppings like cheese, lettuce, tomatoes, salsa, etc., for flavourful sweet potato tacos.
- Make a salad: Toss these oven roasted sweet potatoes with a whole grain (like cooked brown rice or quinoa) and some veg for a filling warm salad. Or toss it into my Rocket Salad with Sun-Dried Tomatoes.
- Try a sweeter option: You can even turn sweet potatoes into a healthy dessert/breakfast option – just swap out the seasoning for brown sugar and warming spices like cinnamon and nutmeg.
How to make roasted sweet potato cubes
Preheat your oven to 190°C fan / 210°C conventional (370° fan /410°F conventional). A hot oven is key for crispy roasted sweet potato cubes.
- Start washing the sweet potatoes, drain and dry them (Image 1).
- Then using a chopping board, slice your potatoes into 1 inch cubes (Image 2).
3. Add the potatoes cubes to a foil lined baking sheet, then add the paprika, onion and garlic powder. Season generously with salt and pepper. Drizzle over the olive oil and toss with your hands, ensuring all of the sweet potato cubes are evenly coated (Image 3).
4. Spread the cubed sweet potatoes in a single layer, as overcrowding is the main reason roasted sweet potatoes turn soft instead of crispy. Pop in the oven for 30 minutes, shaking the tray halfway. Serve with a sprinkle of salt and black pepper and dig in! (Image 4).
Serve the roasted sweet potato cubes with soups like Celeriac Soup, Red Cabbage Soup with Feta, or this Leek and Potato Soup.
Tips for the best result
- When making cubed sweet potato recipes like this one, leaving plenty of space between the diced sweet potatoes is essential. I’ve tested this both with crowded and spaced trays, and giving the cubes room consistently makes the biggest difference in getting crispy edges.
- The key to making the best roasted sweet potato cubes is minimally flipping/shaking the tray. I recommend only flipping/shaking the potatoes once for this recipe. By doing this, you’re allowing them to caramelise as they cook.
- The oil in this recipe helps keep the cubed sweet potatoes from sticking to the pan. It also helps create a deliciously crispy exterior.
- Since this recipe requires the potatoes to caramelise, you’ll want to place a sheet of foil on the baking pan before adding the potatoes. This extra step helps make cleaning up much easier once the potatoes are roasted.
How long to roast sweet potato cubes (and how to make them crispy)
When roasting cubed sweet potatoes in the oven, timing mostly comes down to size. For evenly cut 1-inch cubes, about 30 minutes at a high temperature gives you tender centres and caramelised edges. Smaller cubes will cook faster, while larger chunks may need an extra 5-10 minutes, so keeping the pieces similar in size helps everything roast evenly.
If you’ve ever wondered how long to cook cubed sweet potatoes, the goal isn’t just softness – it’s colour and texture. You’ll know the roasted sweet potato cubes are ready when the edges are golden and slightly crisp and a fork slides in easily. This sweet potato cubes oven time works consistently because the high heat lets the natural sugars caramelise instead of steam.
Sweet potatoes have more sugar than regular potatoes, which is why they caramelise instead of just browning. A hot oven, enough oil to lightly coat each piece, and plenty of space on the tray let the heat circulate properly. Spreading the cubes out in a single layer is key – when they’re crowded together, moisture gets trapped and the potatoes soften rather than roast.
Why your roasted sweet potato cubes aren’t crispy
If your roasted sweet potato cubes turn out soft instead of crisp, one of these is usually the reason:
- The baking sheet is overcrowded, causing the potatoes to steam
- The baked sweet potato cubes were flipped too often before caramelisation could happen
- The oven temperature wasn’t hot enough
- The sweet potatoes were cut into uneven sizes, so they cooked at different speeds
Roasting is simple once these small details are right, and after a few batches you’ll start to recognise exactly when the cubes are perfectly caramelised and ready to come out of the oven. Once you get comfortable roasting cubed sweet potatoes this way, the same method works beautifully for wedges and sweet potato chunks too.
Serving Suggestions
These roasted sweet potato cubes make an easy side dish for weeknight dinners, meal prep, or holiday spreads. You can pair them with roasted poultry, pork loin, or pan-fried steak. Or, make some lovely vegetarian/vegan recipes – try turning them into tacos or using them as a topping for salads.
Try them with:
Leftover Storage and Reheat Instructions
Refrigerator: Store leftover roasted sweet potato cubes in an airtight container in the fridge for up to 4 days. Let them cool completely before storing to prevent excess moisture from making them soft.
Freezer: You can freeze cooked sweet potato cubes for up to 2 months in a freezer-safe container or bag. For best texture, freeze them in a single layer first, then transfer to a container once solid.
Reheat: Reheat this sweet potato cube recipe in a hot oven or air fryer at 200°C / 400°F for 5-8 minutes to help bring back their crispy edges. Microwaving works for convenience, but the cubes will be softer rather than crispy.
FAQs
Roasting uses a higher oven temperature than baking, which helps sweet potatoes caramelise and develop crispy edges. Baking is typically done at lower heat, so the potatoes cook through but stay softer rather than becoming golden and crisp.
No, you don’t need to soak sweet potatoes before roasting. Soaking is sometimes used for fries, but for roasted sweet potato cubes it can actually add extra moisture and prevent them from crisping properly in the oven.
Roasted sweet potato cubes usually turn out soft if they’re covered or overcrowded on the pan. Make sure the cubes are spread in a single layer, lightly coated in oil, and roasted at a high temperature so they caramelise instead of steaming.
Mushy sweet potatoes are almost always caused by overcrowding the baking sheet or cutting uneven pieces. Giving the cubed sweet potatoes space allows heat to circulate so the edges roast and crisp up.
No, sweet potatoes and yams are different vegetables. True yams have rough, darker skin and a more starchy texture, while sweet potatoes are naturally sweeter with softer flesh (once cooked).
Sweet potatoes pair well with both savoury and sweet seasonings. Smoked paprika, garlic powder, chili powder, cumin, cinnamon, lime juice, and fresh herbs all complement the natural sweetness of the diced sweet potatoes in oven.
Yes, cubed sweet potatoes cook very well in an air fryer. Preheat to 400°F / 200°C, cook for about 10-12 minutes, and shake the basket halfway through so the cubes cook evenly and develop crispy edges.
Here are some other healthy side dishes to try: Creamy White Beans with Parmesan (Cannellini Beans), Israeli Couscous (Pearl Couscous Recipe) and Sauteed Broccoli (in 10 minutes!).
Roasted Sweet Potato Cubes
Ingredients
- 1 kg sweet potatoes, washed thoroughly (£1.20)
Cupboard essentials
- 3 tbsp olive oil
- 1 tbsp smoked paprika
- 1 tsp onion powder
- 1 tsp garlic powder
- Salt and pepper
Method
Preheat your oven to 190°C FAN/ 210°C conventional / 370°F to 410°F
- Start by slicing your potatoes into 1 inch cubes. Add foil to a baking sheet, then add the potato cubes, paprika, onion and garlic powder. Season generously with salt and pepper.
- Drizzle over the olive oil and toss with your hands, ensuring all of the sweet potato cubes are evenly coated.
- Pop in the oven for 30 minutes, shaking the tray halfway.
- Serve with a sprinkle of salt and black pepper and dig in!
Notes
- Leave space between sweet potato chunks for a crispy exterior and consider using two baking sheets for smaller ones.
- Flip sweet potatoes only once to allow caramelisation.
- Don't skip the oil for a crispy texture and to prevent sticking.
- Use foil on the baking pan for easy cleanup after caramelisation.
Nutrition
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