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Caramelized Onion Kabocha Squash Spread — Savory Fall Recipe

This post is sponsored by OPI. I’m honored to be an ambassador for their Nature Strong vegan collection. The Nature Strong polishes are 9-free and formulated with ingredients derived from nature. They’re vegan and cruelty-free.

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Kabocha Caramelized Onion Spread is my go-to kabocha squash recipe. It balances savory and sweet, and makes an addictive topping for toast, a tasty dip, or a flavorful sandwich filling. I often make it for holiday gatherings — it’s simple to prepare and tastes like the season.

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I’m hosting a small Christmas/housewarming party. I’ve picked my outfit, decorated the house, invited a few friends, and now I’m finalizing the menu. First on the list: this kabocha caramelized onion spread. With only a handful of quality ingredients, it delivers big, cozy flavor — a unique vegan take on squash that’s always a crowd-pleaser.

Kabocha Squash is Amazing

I first fell for kabocha while working at Peacefood Cafe in New York City. Longtime readers might remember my early kabocha recipe. Kabocha resembles sweet potatoes: starchy, sweet, and rich in beta-carotene, which gives it a deep orange color. It is generally starchier and drier than jewel or garnet sweet potatoes, so for a creamier spread I blend kabocha with a bit of sweet potato.

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How to Choose a Kabocha Squash

  • Choose a squash that feels dense and heavy for its size.
  • The skin should be firm and free of soft spots.
  • Darker skin often indicates a richer flavor.

Perfect Pairings

  • For parties, serve the spread on mini toasts. Finish with a drizzle of olive oil and a sprinkle of parsley.
  • A crisp dry white wine complements the flavors.
  • Pair with smoky collard greens for a hearty plate.
  • NAIL POLISH PAIRING: For this party I painted my nails with Intentions Are Rose Gold from OPI’s Nature Strong collection — a sparkly, long-lasting shade that’s perfect for holiday celebrations. Nature Strong polishes are made with ingredients sourced from plants like potatoes, sugar cane, and corn. Finish with the Nature Strong Top Coat for lasting shine.

Jenné Claiborne holding kabocha squash toast

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5 from 1 vote

Kabocha Caramelized Onion Spread | Best Kabocha Squash Recipe

By: Jenné Claiborne
A silky kabocha and caramelized onion spread that’s perfect on crostini, as a dip, or on sandwiches. This version is adapted from a New York Times recipe and adjusted to pair kabocha with sweet potato for a creamier texture.
Prep Time: 10 minutes
Cook Time: 30 minutes
Servings: 6

Ingredients

  • 4 cups kabocha squash, peeled & cubed (about ½ a small squash)
  • 1 cup sweet potato puree, from one baked sweet potato
  • 1 tsp red chili flakes
  • 2 yellow onions, thinly sliced
  • 2 tbsp apple cider vinegar
  • 1 tsp maple syrup
  • 1 tbsp fresh sage, minced
  • ½ tsp salt
  • ½ tsp black pepper, plus more for garnish
  • Pomegranate molasses for drizzling
  • 1 baguette, sliced
  • 1/4 cup fresh parsley and mint for garnish

Instructions

  • Place the kabocha squash in a steam basket and steam for 10–15 minutes, until tender. The sweet potato can be steamed alongside the squash.
  • Heat 2 tablespoons of oil in a large skillet over medium heat.
  • Add the sliced onions and sauté until they start to turn translucent.
  • Reduce heat to low and caramelize the onions for about 30 minutes, stirring occasionally until they’re soft and golden.
  • Remove the pan from heat and stir in the apple cider vinegar to deglaze.
  • Add the cooked kabocha and sweet potato to the onions and mash together until mostly smooth.
  • Stir in maple syrup, minced fresh sage, salt, and black pepper. Mix well.
  • Taste and adjust seasoning with more salt or pepper if needed.
  • Toast the bread, spread the kabocha mixture on top, and finish with a drizzle of pomegranate molasses and chopped herbs.

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