Familiar comfort food, made with extra time, care, and layers of flavor. A photo for every step!

Erin, creator of The Flavored Mind

Hi, I’m Erin!

I’m a developer by profession and a home cook by passion. I create bold comfort food with layered flavors, detailed instructions, and a photo for every step.

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Soy-Glazed Japanese Sweet Potatoes

Yield: 6 servings

Total Time: 15m active + 4-6h chill + 40m-1h cook

Deep flavor, simple ingredients!

Roasted and glazed slices of Japanese sweet potatoes with a golden-brown exterior in a metallic serving tray

Ingredients

  • 3 lb. japanese sweet potatoes, scrubbed, sliced into ¼-inch thick rounds
  • 2 tbsp lighter tasting olive oil
  • 2 tbsp reduced-sodium soy sauce
  • 2 tbsp brown sugar
  • 2 tsp rice vinegar
  • 1 tsp sesame oil
  • 1 tsp worcestershire sauce*
  • ¾ tsp ground black pepper
  • ½ tsp garlic powder
  • ½ tsp smoked paprika
  • ½ tsp kosher salt
  • ¼ tsp crushed red pepper flakes
  • 1 Kingsford Extra Tough Grilling Bag (15.5 x 10 in), or a tightly sealed heavy-duty foil packet

*VEGETARIAN NOTE: Use vegetarian Worcestershire sauce, or omit the Worcestershire and increase the soy sauce and rice vinegar by 1 tsp each.

Instructions

Four unpeeled Japanese sweet potatoes are arranged on a countertop with various condiments and spices in the background.

Step 1: Gather all of the ingredients for the sweet potatoes and prep the potatoes.

View from inside a crumpled foil bag showing a partially visible, glazed sweet potato with spices and seasoning.

Step 2: Add the olive oil, soy sauce, brown sugar, rice vinegar, sesame oil, worcestershire sauce, ground black pepper, garlic powder, smoked paprika, kosher salt, and crushed red pepper flakes to the grilling bag (or heavy-duty foil packet).

An empty, crumpled foil bag with remnants of soy glaze and a dark brown sauce at the bottom.

Step 3: Seal briefly and shake vigorously until combined.

Sliced sweet potatoes coated in a shiny soy glaze nestled in a crinkled foil container.

Step 4: Add the sweet potatoes.

A crumpled piece of aluminum foil wrapped around sweet potatoes sits on a wooden cutting board.

Step 5: Seal the grilling bag tightly, then shake and turn it gently until the sweet potatoes are evenly coated in the marinade.

Place in the refrigerator and chill for 4-6 hrs (flipping halfway through) to let the flavors develop and soak in.

Sliced, roasted Japanese sweet potatoes with a wooden spoon on a baking sheet, showcasing a caramelized golden-brown finish.

Step 6: Cook the grilling bag on a GRILL over MEDIUM (350-400°F/175-205°C) indirect heat for 40 mins, turning once halfway through, until the sweet potatoes are soft and tender when pierced with a fork.*

Cook the grilling bag in an OVEN at 375°F/190°C on a sheet pan for 45-60 mins, carefully flipping the bag halfway through, until the sweet potatoes are soft and tender when pierced with a fork. 

*NOTE: Because of the sugar content, avoid DIRECT heat to prevent burning.

Bon Appétit!

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