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Garlic and green onion mashed potato grilled cheese

Why serve french fries on the side of a grilled cheese sandwich when you can enjoy mashed potatoes inside one?

By Shane KearnsGrilled Shane / March 2, 2011

Grilled cheddar cheese, garlic, onion, broccoli, and creamy mashed potatoes puts the spud bar in a sandwich.

Grilled Shane


As I do when I don’t have an idea for a sandwich, I walk around Whole Foods looking for inspiration for the week’s sandwich. However, this time, it was not Whole Foods that inspired me, but me remembering an old idea I never tried. Way back, I had thought of creating a mashed potato grilled cheese but I never truly thought the idea through. Instead, I ended up creating the Orange Basil Sweet Potato Grilled Cheese. A good sandwich for sure, but not a true mashed potato grilled cheese. Now was my chance to truly investigate what a mashed potato grilled cheese would taste like. Yes, other people have made a grilled cheese based on baked potato toppings, but never actual mashed potatoes in a grilled cheese. I asked Facebook what they thought and I was on my way to creating something truly unique.

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Grilled Shane

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Garlic and green onion mashed potato grilled cheese

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Cheese #1: Great Lakes sharp cheddar

When thinking about mashed potatoes and getting inspiration from a loaded baked potato, cheddar was the first cheese that I thought of. Luckily, my local market had Great Lakes Sharp Cheddar on sale. After tasting said cheese, I realized I could have gone with a sharper cheddar, which is what I enjoy, but the lack of bite did not affect the outcome of the sandwich. If you like a more mild cheddar, this cheese would be perfect for you.

Cheese #2: Dofino creamy havarti

As was the case with the Nachos & Cheese Super Bowl Grilled Cheese, I felt that one cheese was not enough. This Wisconsin havarti was also on sale, so why not have something a bit sharp and a bit creamy mixed together? This cheese is smooth and buttery and a perfect contrast to the cheddar. The harvarti would be great on a grilled cheese just by itself and worked perfectly in this sandwich.


I kept going back and forth on what to include in the mashed potatoes themselves and what to include in the sandwich. I had some general idea and then continued to think about the it ingredient that would send the sandwich over the top.

I knew from the beginning that I wanted to include garlic (I used roasted garlic) and chives or green onions directly in the mashed potatoes. (Keep in mind, chives and green onions are similar ingredients and used interchangeably, but they are not exactly the same.) I went with chopped green onions for this sandwich. I used approximately two stalks for two sandwiches and some left over mashed potatoes. Both the garlic and green onions added a great kick (not spicy kick though) that resonated throughout the dish and was the reason the sandwich was so successful.