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Viral TikTok Onion Boil Recipe

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4 from 20 reviews

This viral TikTok Onion Boil recipe features a whole sweet onion roasted to tender perfection with a flavorful blend of vegan butter, olive oil, and Cajun seasoning. Wrapped tightly in foil and slow-roasted, the onion becomes soft and slightly caramelized, with an optional broiling step to enhance a golden, crispy exterior. It’s a unique, comforting, and savory dish perfect for serving alongside rice, roasted veggies, or crispy chickpeas.

  • Total Time: 1 hour 15 minutes
  • Yield: 2 servings

Ingredients

Main Ingredients

  • 1 large (15 ounce) sweet onion, peeled and ends trimmed off
  • 1 tablespoon vegan butter
  • 1 tablespoon extra virgin olive oil
  • 1 teaspoon Cajun seasoning
  • 1/4 teaspoon salt (plus more to taste when serving each layer)

Optional Seasonings

  • 1/4 teaspoon garlic powder
  • 1/4 teaspoon Old Bay seasoning

Optional Garnish

  • Finely diced parsley leaves

Instructions

  1. Season the onion: Use a small melon baller to scoop out the top center portion of the onion about one third down, creating a well. Place the onion on a sheet of aluminum foil and add the vegan butter into the well. Mix the Cajun seasoning and olive oil together, then pour the mixture over the butter in the well, letting it drip down the onion sides. Sprinkle with salt and any optional seasonings as desired.
  2. Wrap the onion in aluminum foil: Seal the entire onion tightly in the foil, making sure it’s well enclosed to lock in moisture and flavors. Place the wrapped onion in a small baking dish or cast iron skillet to catch any oil that might seep out during cooking.
  3. Roast the onion: Place the baking dish on the center rack of the preheated oven and roast for 1 hour. The onion should become fork-tender and jiggle slightly in the center, with a gentle caramelization on the surface.
  4. Check doneness: Carefully open the foil to inspect the onion. If it’s not tender enough or caramelized to your liking, reseal the foil and roast for an additional 10 minutes before rechecking.
  5. Optional broiling for caramelization: For extra golden-brown color and crispy exterior, open the foil, drizzle more melted vegan butter or olive oil, and sprinkle a pinch of salt. Turn the oven to broil and broil the onion for 5-10 minutes, watching closely to avoid burning.
  6. Serve the onion: Peel away the outer onion layer, then enjoy each soft, flavorful layer underneath. Pour all the flavorful juices collected in the foil over the onion before serving. Optionally garnish with finely diced parsley. This dish pairs wonderfully with rice, crispy chickpeas, and roasted vegetables like Brussels sprouts. Serve hot and savor every bite.

Notes

  • Using a small melon baller ensures an even hollow in the onion for the butter and seasoning to melt inside.
  • If you do not have vegan butter, substitute with regular butter for non-vegan version.
  • Adjust seasoning quantities to taste, especially salt and Cajun seasoning.
  • Broiling is optional but highly recommended for added texture and caramelization.
  • Serve with side dishes such as rice, roasted Brussels sprouts, or crispy chickpeas for a complete meal.
  • Be cautious when opening the hot foil to avoid steam burns.
  • Author: ELLA
  • Prep Time: 10 minutes
  • Cook Time: 1 hour 5 minutes
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American
  • Diet: Vegan