Beni-Imo Karikari & Kokuto Peanuts
紅芋けんぴと黒糖ピーナッツ·(beni-imo kenpi to kokutō pīnattsu)
Sata Andagi & Island Sweets: Snacks and Rituals
If you grew up in an Okinawan-American house, the smoky, almost savory scent of melting kokuto is the undeniable smell of home. These two snacks—sugar-crusted peanuts and crispy purple sweet potato sticks—are the ultimate grandmother treats, fiercely simple and heavily rooted in the island philosophy of food as medicine. There’s a catch for the diaspora, though: agricultural quarantines make importing raw Okinawan sweet potatoes to the mainland illegal. To recreate this on a weeknight in Ohio, you rely on American-grown Stokes Purple potatoes. Keep it strictly canonical, trust the raw materials, and leave the vanilla extract in the cupboard.
Before you start
Rigorously dry the sweet potatoes.
After slicing the potatoes into matchsticks, vigorously pat them completely dry with paper towels. Removing the surface moisture prevents aggressive oil splatter and is crucial for achieving the signature karikari (crunchy) texture.
Ingredients
- unsalted dry-roasted peanuts1 cup
- kokuto or dark muscovado sugar1/2 cup
- water2 tbsp
- sea salt1 pinch
- Stokes Purple or Okinawan sweet potatoes1 lb
- neutral frying oil1 qt
- turbinado or demerara sugar3 tbsp
- water2 tbsp
- flaky sea salt1 pinch
Method
- 01
Boil the black sugar syrup.
In a medium non-stick skillet, combine the kokuto and 2 tablespoons of water over medium heat. Stir gently until the sugar melts and boils into a glossy, bubbling syrup, about 1 to 2 minutes. Do not walk away; unrefined sugar scorches easily.
- 02
Seize and crystallize the peanuts.
Add the roasted peanuts to the boiling syrup and immediately turn off the heat. Stir aggressively. As the pan cools, the water evaporates and the sugar will suddenly cloud, seizing into a dry, sandy crust around the nuts. Dump onto a parchment-lined tray to cool completely.
- 03
Fry the sweet potatoes blind.
Heat 1.5 inches of neutral oil in a heavy pot or Dutch oven to 350°F. Drop in the potato matchsticks in batches and leave them completely untouched for 5 minutes.
- 04
Listen and feel for doneness.
Because the potatoes are naturally dark purple, you cannot rely on visual browning. After 5 minutes, prod them with chopsticks. Cook for another 4 to 5 minutes until the aggressive bubbling of the oil quiets down and the potato sticks feel hard and hollow against your chopsticks. Transfer to a wire rack to drain.
- 05
Glaze the crispy fries.
In a clean wide skillet, heat the turbinado sugar and remaining 2 tablespoons of water over medium heat until syrupy. Toss the hot fries in the pan to coat them in a microscopic layer of sugar, sprinkle immediately with flaky sea salt, and let cool on a parchment-lined tray to harden into a crunchy shell.
Notes
Finding the right sugar.
Standard American brown sugar won't work here. It is just refined white sugar with added molasses and refuses to crystallize the same way. You need the complex, slightly bitter edge of kokuto (Okinawan black sugar) from a Japanese market, or a dark muscovado.
Sourcing the potatoes.
Authentic beni-imo is banned from export to the US mainland to prevent the spread of the sweet potato weevil. Look for Stokes Purple at your local grocer; they have the exact same antioxidant-dense, deep violet flesh and earthy sweetness required for this dish.
From Cook Okinawan in America.