A Healthier, Crispier Twist on a Korean Classic: Air Fryer Goguma Mattang
When the weather turns chilly, there is nothing quite as comforting as a warm, sweet potato snack. While simply roasting or steaming sweet potatoes is delicious, sometimes you crave something a little more indulgent—like Goguma Mattang (Korean Candied Sweet Potatoes). Traditionally, this popular Korean street food and side dish is made by deep-frying chunks of sweet potato until golden and then tossing them in a thick, caramelized sugar syrup. However, the deep-frying process can be intimidating, messy, and high in calories.
Today, I am sharing an ultimate, foolproof recipe that completely eliminates the need for deep-frying. By using an air fryer, we can achieve that iconic crispy exterior and fluffy interior with just a fraction of the oil. This 20-minute recipe is ridiculously easy, cleanup is a breeze, and the result is a perfectly glossy, sweet, and sticky treat that both kids and adults will absolutely devour. Whether you need a quick after-school snack, a holiday side dish, or a cozy weekend treat, this air fryer candied sweet potato recipe is your answer.
Why You Will Love This Air Fryer Method
- Guilt-Free Indulgence: By substituting a deep pot of oil for just a few tablespoons of olive oil, you significantly cut down on unhealthy fats and calories while still retaining the mouthwatering texture.
- Zero Mess: Deep frying means dealing with splattering oil and figuring out how to dispose of leftover grease. With this recipe, a simple plastic ziplock bag and an air fryer basket are practically all the equipment you need. Cleanup takes less than five minutes.
- Perfect Texture Every Time: The hot, circulating air of the air fryer draws out the excess moisture from the sweet potatoes, creating a wonderfully crisp crust that holds up perfectly when coated with sweet syrup.
Essential Ingredients for Goguma Mattang
The beauty of this recipe lies in its simplicity. You only need four basic ingredients that you likely already have in your pantry.
- Main Ingredient: 3 to 4 medium-sized sweet potatoes. For the best texture, opt for Korean or Japanese sweet potatoes (with purplish skin and pale yellow flesh). They are denser, sweeter, and hold their shape much better than the watery, orange-fleshed yams.
- Coating Oil: 4 tablespoons of olive oil. If you prefer a more neutral flavor, you can easily substitute this with canola, grapeseed, or avocado oil.
- The Sweet Glaze: 4 tablespoons of Korean rice syrup (Jocheong), honey, oligosaccharide, or corn syrup. A mix of honey and rice syrup provides a deep, rich flavor and a beautifully shiny glaze.
- Garnish: A pinch of toasted sesame seeds (black sesame seeds look especially beautiful against the glossy golden potatoes).
Pro-Tips Before You Start Cooking
Choosing the Right Sweet Potato: As mentioned, Asian sweet potatoes (like the chestnut or honey varieties) are ideal. They have a fluffier, chestnut-like texture that contrasts perfectly with the sticky glaze.
Removing the Starch: Once you chop your sweet potatoes, soak them in a bowl of cold water for about 10 minutes. This removes excess surface starch, preventing them from sticking together in the air fryer and ensuring maximum crispiness. Be sure to pat them completely dry with a paper towel before adding oil, as water and oil do not mix!
Step-by-Step Cooking Instructions
1. Prep the Sweet Potatoes
Start by washing the sweet potatoes thoroughly. Peel the skin off using a vegetable peeler. While the skin is edible and nutritious, removing it gives the mattang that classic, smooth, melt-in-your-mouth texture. Cut the peeled sweet potatoes into bite-sized chunks, roughly 1-inch thick. Try the "roll-cut" (cutting at an angle, rolling the potato, and cutting again) to create more surface area for the air fryer to crisp up.
2. The Ziplock Bag Oil Trick
Place all your dried sweet potato chunks into a large food-safe plastic bag or ziplock bag. Pour in the 4 tablespoons of olive oil. Trap some air inside, seal the bag tightly, and shake vigorously! This is a fantastic hack to ensure every single piece is evenly coated with a very thin layer of oil without getting your hands greasy or dirtying a mixing bowl.
3. Air Frying to Golden Perfection
Arrange the oil-coated sweet potato chunks in your air fryer basket in a single layer. Make sure they are not stacked on top of each other, as they need air circulation to get crispy. Set the temperature to 400°F (200°C) and air fry for 20 minutes. At the 10-minute mark, pull the basket out and give it a good shake or flip the pieces with tongs so they brown evenly on all sides. When they are done, they should be beautifully golden brown and fork-tender inside. Honestly, they are delicious just like this as a savory-sweet snack!
4. Creating the Signature Glossy Glaze
Now for the magic. In a wide pan or wok, add your sweeteners. You can use 100% honey, but mixing 2 tablespoons of honey with 2 tablespoons of rice syrup yields the best sticky consistency. Heat the pan over medium-low heat. Once the syrup just begins to bubble and froth, immediately turn off the heat. Toss in your hot, air-fried sweet potatoes and gently fold them with a spatula until every piece is glistening with the syrup. Do not cook them in the syrup over high heat, or the sugar will burn and become bitter.
5. Garnish and Cool
Sprinkle a generous amount of toasted sesame seeds over the glazed sweet potatoes. The nuttiness of the sesame seeds balances the intense sweetness of the syrup. Finally, transfer the potatoes onto a piece of parchment paper or a wire rack, making sure they don't touch each other. Let them cool for about 5 minutes. As they cool, the sugar glaze will slightly harden, creating that incredible candy-like shell that snaps when you bite into it.
How to Serve and Store
Goguma Mattang is incredibly versatile. In Korea, it is often enjoyed with a cold glass of milk, which perfectly balances the sweetness. For adults, pairing it with a hot cup of black coffee or unsweetened green tea is an absolute delight.
If you have leftovers (which is rare!), store them in an airtight container at room temperature for up to two days. Do not refrigerate them, as the cold temperature will make the sweet potatoes hard and dry out the starchy interior. If they lose their crispness the next day, you can microwave them for about 15-20 seconds just to soften the center slightly, but they are best enjoyed fresh on the day they are made.
Try this effortless air fryer candied sweet potato recipe today. It is a fantastic way to elevate a humble root vegetable into a gourmet, café-quality dessert without any of the deep-frying fuss!