• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer

Fearless Fresh logo

Fearless Cooking Club

Dark Red Beets
  • Learn to Cook
    • Free Cooking Charts
    • My Cookbook
    • Recipe Archive
  • About

Published: Nov 9, 2019

Butternut Squash Gourmet Grilled Cheese Sandwich with Caramelized Onion and Sage Butter

Butternut Squash Grilled Cheese Sandwich with Caramelized Onion and Sage Butter on http://www.theculinarylife.com

– Yes, I’m a fan of gourmet grilled cheese sandwiches –

A few weeks ago I had lunch at the American Grilled Cheese Kitchen, a classic but innovative new luncherie in San Francisco. I wrote about my experience over at Bay Area Bites, and ever since that day, I’ve had a lingering dream about the lovely grilled cheese sandwich I ate that day: the Butternut Buster, a rich, sweet combination of gruyere, fontina, prosciutto, sage butter, caramelized onions, and butternut squash. Yes, you read that correctly.

Now, I’m a HUGE cheese fan. Hell, I wrote a whole book about cheese and I’ve been known to throw together some of the most epic cheese plates known to my social circle. 

Doesn’t that sound like the most gourmet, incredibly decadent sandwich ever? Here’s my description of the experience from my review post:

Before me sat a sandwich that must have measured 4-inches thick. Between the thick, moist slices of toasted levain bread were layer upon layer of fresh sage butter, caramelized onions, roasted butternut squash, tender prosciutto, and some of the most gooshy, melty gruyere and fontina cheese I’ve ever eaten. I dove into the sandwich like a dinosaur eating a caveman, and before long I was covered in cheese, meat, and breadcrumbs. I swear, I don’t think I took a breath through the first half of my lunch. For that two minutes, my life was nothing but a lambada of flavor, texture, and aroma.

Nate Pollak, the owner of American Grilled Cheese Kitchen, was kind enough to share his gourmet grilled cheese recipe for the Butternut Buster, and he was DOUBLY nice to allow me to share it with you all, here on my blog. So, make this amazing sandwich as soon as you possibly can, and then get your butt down to the American Grilled Cheese Kitchen in San Francisco. And be sure to ask for your sandwich on gluten-free bread, which they make in-house. It’s incredible.

 

Butternut Squash Grilled Cheese Sandwich with Caramelized Onion and Sage Butter

The Butternut Buster, the ultimate gourmet grilled cheese, is a rich, sweet combination of gruyere, fontina, prosciutto, sage butter, caramelized onions, and butternut squash. Yes, you read that correctly.
No ratings yet
Print Pin
Course: Entree
Cuisine: American
Prep Time: 20 minutes minutes
Cook Time: 10 minutes minutes
Total Time: 30 minutes minutes
Servings: 4 servings
Calories: 1171kcal
Author: Nate Pollak and Heidi Gibson

Ingredients

For the sage butter

  • 1/2 pound salted butter
  • 5 large sage leaves

For the caramelized onions

  • 3 tablespoons vegetable oil
  • 1 large white onion diced
  • 1/2 teaspoon kosher salt

For the roasted butternut squash

  • 1 small butternut squash
  • 3 tablespoons vegetable oil
  • 1/2 teaspoon kosher salt.

For assembling and cooking the sandwich

  • 8 tablespoons sage butter (see recipe below)
  • 8 slices of thick country bread
  • 6 tablespoons caramelized onions (see recipe below)
  • 6 tablespoons gruyere cheese
  • 12 thin slices prosciutto
  • 8 slices of roasted butternut squash (see recipe below)
  • 6 tablespoons fontina cheese (preferably a stinky Italian fontina)

Instructions

To make the sage butter:

  • Cream the salted butter with a stand mixer or electric hand beater.
  • Pluck leaves off sage sprigs and chop them coarsely.
  • Add chopped leaves to butter and mix until evenly distributed.

To make caramelized onions:

  • Coat a skillet with a thin layer of vegetable oil, add the diced onions and salt, and cook on medium heat, stirring regularly, until onions are fully caramelized (dark brown color, sweet smell/taste, no more liquid in the pan).
  • Remove onions from heat and set aside.

To make roasted butternut squash

  • Preheat oven to 375°F (190°C).
  • Peel the skin off the squash and slice the squash into thin rounds (so you get thin squash “disks”).
  • Spread the squash slices onto a baking sheet with a sheet liner coated in a non-stick cooking spray. Drizzle oil over the squash and sprinkle a few pinches of salt.
  • Bake the squash for about 10-15 minutes, rotating the pan half way through. Bake until the slices are soft and darken in color to a rich orange.
  • Remove from oven and set aside

To assembly and cook

  • Preheat oven to 500°F (260°C).
  • Spread a thin layer of sage butter on the outer side of each of the slices of bread. Lay the bread butter-side down on a cookie surface.
  • Spread a thin layer of caramelized onions on the inside of one of the slices of bread. Follow with a layer of gruyere, a thin layer of prosciutto, 3 slices of roasted squash slices, and a layer of fontina cheese.
  • Place the other piece of buttered bread (butter-side out) on top of the layer of fontina.
  • Place the sandwich on a baking sheet and slide into oven. Cook for 1 minute, until top slice of bread is toasted and golden-brown. Remove the sandwich from the oven, flip it over, and bake again until the new top slice of bread is also golden-brown and all cheese is fully melted.
  • Remove from oven.

Nutrition

Serving: 1g | Calories: 1171kcal | Carbohydrates: 41g | Protein: 102g | Fat: 66g | Saturated Fat: 27g | Polyunsaturated Fat: 7g | Monounsaturated Fat: 27g | Cholesterol: 312mg | Sodium: 9857mg | Potassium: 2562mg | Fiber: 5g | Vitamin A: 17650IU | Vitamin C: 63.5mg | Calcium: 260mg | Iron: 6.3mg

This content was originally posted on FearlessFresh.com.

« Oysters Rockefeller from Wellfleet, Cape Cod
Gratin Dauphinois Recipe »

About Steph

I’m Steph, a classically-trained cooking teacher and professional recipe developer who’s going to show you how to COOK LIKE A BOSS.

Follow me for friendly-fierce guidance and training. Let's get you on the road to becoming a master home cook!

Primary Sidebar

Stephanie Stiavetti

I'm a classically trained chef and cooking teacher. I can teach you how to be a ninja home cook.

THIS WEBSITE USES COOKIES. We use cookies to deliver our services and improve your experience. By using our website, you agree to the use of cookies as described in our Cookie Policy and Privacy Policy. These documents are located in the footer of every page on this site.

Latest Posts

Peeling Apples

By Steph |

Fearless Cooking Club Training Videos on YouTube!

A lot has changed since the pandemic borked the entire world. I changed careers and basically flipped the OFF switch on my entire culinary business, including the Fearless Cooking Club. I left the Fearless Fresh site up in case anyone needed the recipes, but I have not logged into the site in… I can’t remember…

Keep reading...

Guide to Roasting A Perfect Turkey Cover

By Steph |

How to Roast A Turkey In the Oven — How long and how to prepare it

Learning how to roasting a turkey in the oven is actually incredibly easy when you get the hang of it. These tips will help you roast your bird to perfection. Here you’ll learn how long to roast a turkey, and the best way to prepare it. I can’t tell you how many questions I get every year from people who are completely intimidated by the idea of roasting turkeys in their ovens. Most of these people are great cooks, and in fact, have no problem roasting a chicken; but give them a bird over three pounds and apparently their earlier bird-roasting experience goes out the window. Perhaps the problem is that they are presenting their roast turkey to anywhere from five to 20 picky people. Or maybe it’s the fact that your dinner investment suddenly went from $9 to $45.

Keep reading...

Sheep's Milk Cheeses

By Steph |

Cheese 101: Three Sheep’s Milk Cheeses You Must Try

These days, sheep’s milk cheeses dominate my list of favorite dairy treats. For some, they’re an acquired taste, but for others like me, they’re a staple in our cheese drawer. Maybe it’s the luxurious fatty texture—sheep’s milk is incredibly rich, despite the fact that ewes don’t yield that much milk—or perhaps it’s the characteristic grassiness…

Keep reading...

Sour Cream Coffee Cake

By Steph |

Sour Cream Coffee Cake Recipe with Lemon and Vanilla

Seriously, if you’ve never had a sour cream coffee cake, here’s why you should check it out. The sour cream in this cake gives it A LOT more flavor. It’s perfect with a cup of coffee or tea, or even as a quick snack in the afternoon. Buttermilk add a little extra tang without being overpowering. And, if you don’t have sour cream, you can easily substitute plain yogurt. I personally love the combo of lemon and vanilla, so this cake has a nice fresh lemon-y flavor with warm notes of vanilla. When you pair sour cream and vanilla with lemon and buttermilk, the flavor of this cake is blasted out of the stratosphere.

Keep reading...

Can You Cook Quinoa in A Rice Cooker

By Steph |

Can You Cook Quinoa in A Rice Cooker?

Can you cook quinoa in a rice cooker? That’s an EXCELLENT question, and a fair one. The good news is you can cook almost any grain in rice cooker, including quinoa and any other whole grains you might be wanting to try. This trick makes cooking quinoa SUPER easy! Cooking quinoa in rice cooker means you don’t have to worry about the water boiling over and making a huge mess on your stove. It also means perfectly fluffy quinoa every single time, without fail. It’s seriously the easiest way to cook quinoa and add more whole grains to your diet.

Keep reading...

Organized Kitchen

By Steph |

Feeling Overwhelmed?

Feeling overwhelmed with cooking? Let’s start with just one drawer in your kitchen. Here’s why: An organized drawer doesn’t just look better, it will actually help you feel better. If you do one drawer once a week — spending literally 15 minutes of time — by the time the holidays roll around, you will have a WHOLE NEW ORGANIZED KITCHEN.

Keep reading...

How to Cook Spaghetti Squash in the Microwave

By Steph |

How to Cook Spaghetti Squash in the Microwave

Figuring out how to cook spaghetti squash in the microwave is pretty simple, with a few basic bits of advice under your belt. When you know how to cook spaghetti squash in a quick and easy way, you can officially kiss those quick, high-carb meals goodby at the end of a long day. There’s a world of difference in how I feel after a standard pasta meal, and the exact same meal made with spaghetti squash instead.

Keep reading...

clotted cream

By Steph |

10 Most Popular Recipes and Tutorials on Fearless Fresh

Can you believe I’ve never done a roundup of the most popular recipes and posts on Fearless Fresh? These are the recipes and tutorials that readers keep coming back to time and time again… like for YEARS in some cases. These recipes have been read, pinned, shared, cooked, and baked, more than any others on the site. There’s a reason for that: because they’re rock solid. I hope you enjoy them.

Keep reading...

Berry Pie Emo

By Steph |

Why Frozen Fruit Can Be Better Than Fresh Fruit

When it’s the rainy season, I want sunny FRUIT. There’s not a lot growing this time of year, but take heart: frozen fruit it a great option — and I swear! You’re not compromising your health or ideals. Here’s why:⁣⁣ Frozen fruit can be fresher and more high quality than the fresh fruit you buy in the produce aisle. ⁣⁣Yes, you read that right.⁣⁣ Let me explain. Fruit picked for fresh sale is often picked long before it’s ripe, leaving it to ripen off the vine or branch. They do this because under-ripe fruit is easier to transport without damage. This is the case even for organic fruit. ⁣⁣

Keep reading...

Moody Mandarin Oranges

By Steph |

Seven More 5-minute Cooking Lessons

Everyone loved the last list of quick cooking lessons and tips so much, I wanted to post a few more that I know for a fact are useful. Again, these super short cooking tips will change the way you cook if you commit to implementing the concepts. Little changes can have a HUGE impact, especially when they make a shift within the foundation of how you do things. 

Keep reading...

Categories

Learn to Cook:
  • Free Cooking Resources
  • Cooking Classes and Trainings
  • Pro Tips and Cooking Advice
  • Health and Nutrition
  • Kitchen Organization
  • Know Your Ingredients
  • Sharpen Your Cooking Skills
  • Style Your Plate and Tablescaping
  • Cooking Lessons Online with Fearless Fresh
  • De-Stress Dinner
  • Equipment, Gadgets, and Cookware
Recipes by Skill Level:
  • Beginner Recipes
  • Intermediate Recipes
  • Advanced Recipes
  • Most Popular Recipes
General Recipes:
  • Baking and Sweets
  • Breakfast and Brunch
  • Cheese
  • Cookbook Recipes
  • Drinks and Beverages
  • Gluten-Free
  • Main Dishes
  • Keto, Paleo, Low-Carb
  • Soup, Salads, Sides
  • Vegan and Vegetarian

Footer

  • Copyright 2024 – Fearless Fresh® – All Rights Reserved

Find out more:

  • Help & Support
  • About Steph
  • Testimonials & Praise
  • Contact

Legal goodness

  • Terms of Service
  • Privacy + Disclosures
  • Cookie Policy
  • Digital Downloading Terms of Use
  • Store Policies
  • Giveaway, Contest, and Sweepstakes Rules

Copyright © 2026 · Fearless Fresh® · Terms & Conditions · Privacy Policy.

Rate This Recipe

Your vote:




A rating is required
A name is required
An email is required