Sweet Potato Ukoy Recipe: Smoky Garlic Butter Crunch Over Creamy Herb Filling

This sweet potato ukoy recipe brings Filipino comfort food to your table with a creamy herb filling wrapped in crispy, golden layers. 💛 The secret lies in perfectly sliced sweet potatoes that develop a satisfying crunch while maintaining tender centers—just like the classic Filipino dish you know and love, but with a modern twist.

What sets this recipe apart is the balance of textures: the outer layers achieve that coveted crispy edge through careful frying, while the inside stays rich and velvety thanks to a garlic butter-herb filling.

The smoky aroma from the garlic butter infuses every bite, creating a harmony of flavors that's both nostalgic and refined.

This dish is perfect for family gatherings or special occasions, where its visual appeal and comforting flavors make it an instant crowd-pleaser. The crispy exterior contrasts beautifully with the creamy filling, delivering a satisfying mouthfeel that keeps everyone reaching for seconds.

Whether you're serving it as a side dish or making it the star of your meal, this sweet potato ukoy delivers restaurant-quality results with simple techniques and fresh ingredients. Let's get started on creating this Filipino classic in your own kitchen.

Ingredients for sweet potato ukoy

Sweet potatoes, garlic butter, and fresh herbs—these are the stars of your Filipino ukoy masterpiece.

The sweet potatoes are non-negotiable here. Look for firm, vibrant orange ones—the kind that feel heavy for their size. Trader Joe's and Whole Foods carry the best varieties, but regular grocery stores usually have good options too. Peeled and sliced evenly (about 1/4-inch thick), they'll fry up perfectly crispy. If you're worried about the slices being too thick, use a mandoline for precision—it makes all the difference. The butter should be cold and cubed when you mix it with the garlic and herbs; this ensures it melts beautifully during frying and creates that signature smoky aroma. Don't skip the fresh herbs—dried thyme just won't cut it here.

No fresh parsley? Substitute with cilantro or chives—just know the flavor will be slightly different. Running out of thyme? Dried works at half the amount, but toast it lightly in a dry pan first to wake up the flavor. For the frying oil, vegetable or canola oil are your best bets—they handle high heat without burning. If you're making this ahead, you can prep the filling and store it separately for up to 2 days in the fridge, but the potatoes should be fried fresh for that perfect crunch. The sugar is key for caramelization—don't skip it, even if you're watching your sweet intake.

Once fried, these keep their crispiness for about 30 minutes if you store them in a single layer on a wire rack (not stacked). For longer storage, transfer them to an airtight container and keep them at room temperature for up to 2 days. The filling, if made ahead, stays fresh for 3 days in the fridge—just reheat it gently before assembling. Freezing isn't ideal for the fried potatoes (they get soggy), but you can freeze the filling for 3 months. Pro tip: Serve these warm with a sprinkle of extra parsley and a squeeze of lemon for that restaurant-quality finish.

Step-by-step instructions for sweet potato ukoy

Here's how to create crispy, golden sweet potato ukoy with a rich, creamy center.

Preheat your oven to 425°F for the frying step later. Peel the 2 whole large sweet potatoes and slice them lengthwise into even halves. You want each half to be about 1-inch thick—this ensures they cook evenly and hold their shape during frying.

Use a spoon to carefully scoop out the flesh from each half, leaving about ¼-inch thick walls. Place the scooped-out halves on a baking sheet lined with paper towels. Set aside the sweet potato flesh for the creamy filling—you'll need all of it.

In a medium bowl, combine the scooped sweet potato flesh with 0.25 cup heavy cream, 1 tbsp lemon juice, 1 tbsp chopped fresh thyme, 0.25 cup chopped fresh parsley, 1 tsp salt, and 0.5 tsp black pepper. Mix gently but thoroughly until the filling is smooth and well combined.

Taste and adjust seasoning if needed—this is your flavor foundation. The filling should be creamy yet still have some texture from the sweet potato. Set this mixture aside while you prepare the ukoy shells.

In a small bowl, mix 0.25 cup all-purpose flour and 1 tbsp granulated sugar. This combination creates the perfect balance of crispiness and caramelization. In a separate bowl, melt 0.5 cup unsalted butter with 6 minced garlic cloves over low heat until the butter is fully melted and the garlic is fragrant but not browned.

Let the garlic butter cool slightly—it should be warm but not hot when you dip the sweet potato halves. This step is crucial for that signature smoky, garlicky flavor that makes ukoy so irresistible.

Heat 3 cups vegetable oil in a deep skillet or Dutch oven to 350°F. You'll need enough oil to submerge the sweet potato halves about halfway. While the oil heats, dip each sweet potato half into the flour-sugar mixture, shaking off any excess. Then dip into the warm garlic butter, coating both the inside and outside thoroughly.

Carefully place the coated halves into the hot oil, working in batches if needed. Fry for 3-4 minutes per side until they're deep golden brown and crispy. The oil temperature should stay around 350°F—if it gets too hot, the outside will burn before the inside cooks.

Using a spoon, carefully fill each crispy sweet potato half with about 2 tablespoons of the creamy herb filling. The filling should be warm but not hot—if it's too cold, it might chill the crispy exterior too quickly. Place the filled ukoy on a wire rack set over a baking sheet to drain any excess oil.

Serve immediately while the exterior is still crispy and the filling is warm. The contrast between the crunchy, garlicky shell and the creamy, herby center is what makes this dish so special. Enjoy with a side of spicy vinegar dip for the perfect balance!

Serving suggestions for sweet potato ukoy

Classic Filipino Sides

Pair your sweet potato ukoy with sinigang—a tangy Filipino sour soup made with tamarind or calamansi juice, shrimp, and vegetables like eggplant and radish. The bright acidity cuts through the richness of the ukoy beautifully.

I like to serve it with steamed white rice to soak up any extra filling that might spill out. 🌶️

Spicy Vinegar Dip

No Filipino meal is complete without a spicy vinegar dip to complement the crispy ukoy. Mix ½ cup rice vinegar, 1 tbsp soy sauce, 1 tbsp sugar, 1 tbsp sriracha, and 1 minced garlic clove.

Let it sit for 10 minutes before serving to let the flavors meld. This dip adds a tangy kick that balances the creamy filling.

Fresh Herb Salad

A simple mixed greens salad with cucumber, cherry tomatoes, and a light dressing of olive oil and lemon juice refreshes the palate between bites. Toss in some thinly sliced red onion for a crisp bite. The cool, fresh flavors contrast perfectly with the warm, crispy ukoy.