Balsamic Onion Marmalade

from 1 votes

In La Jolla, California, it was the Cassius Clay at The Sandwich Club. In Evanston, Illinois, it was the Pesto Chicken at Rollin’ to Go. It seems that I’ve come to associate an “it” sandwich with every city I’ve ever lived in. And New York is no different.

There’s pastrami on rye at Katz’s, or Le Croque Monsieur at Bistro Bagatelle. But at the absolute top of my star sandwich list is the roasted turkey sandwich at Tom Colicchio’s ‘wichcraft. Piled atop a toasted ciabatta roll are thick slices of warmed turkey breast, sliced avocado, crispy bacon, aioli, and the final touch that makes this sandwich the ultimate New York City ‘wich—balsamic onion marmalade.


Balsamic Onion Marmalade

Elevate good ol' caramelized onions with this recipe for Balsamic Onion Marmalade.
Author: Kelly Senyei
4 from 1 vote
Balsamic Onion Marmalade Recipe
Prep Time 15 minutes
Cook Time 1 hour 30 minutes
Total Time 1 hour 45 minutes
Servings 2 cups


  • 1 tablespoon vegetable oil
  • 4 white onions, thinly sliced (about 8 cups)
  • 2 generous pinches Kosher salt
  • 10 grinds fresh black pepper
  • 1/2 cup sugar
  • 2/3 cup balsamic vinegar


  • Heat vegetable oil in a large skillet over medium heat for 2 minutes.
  • Add the onions, salt and pepper and cook, while stirring occasionally, for 20 minutes until the onions are soft.
  • Add the sugar and reduce the heat to medium-low. Cook the onions, stirring frequently, for 10 minutes.
  • Add the balsamic vinegar and reduce the heat to low. Continue cooking the onions, stirring occasionally, for one hour until they are very soft and dry. Serve warm or at room temperature.
  • ★ Did you make this recipe? Don't forget to give it a star rating below!


Calories: 429kcal, Carbohydrates: 88g, Protein: 3g, Fat: 7g, Saturated Fat: 5g, Sodium: 417mg, Potassium: 482mg, Fiber: 5g, Sugar: 71g, Vitamin A: 25IU, Vitamin C: 16.3mg, Calcium: 96mg, Iron: 1.6mg


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Recipe adapted from 'wichcraft.

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  1. I came across your page earlier this week and today I made this onion marmalade. Wow! I am so impressed with the outcome!! Such an easy recipe, almost fool proof! It really tastes so delicious!

  2. A local restaurant here in bentonville Arkansas used to sell this exact sandwich and I have forever searched for it in my travels. Have you had this anywhere else? Aside from New York