This keto zucchini grilled cheese sandwich is my extra healthy take on traditional grilled cheese! In fact, this low carb sandwich is completely breadless. It uses a tasty, crispy zucchini egg bake similar to a zucchini pizza crust. You slice it into sandwiches, melt your cheese of choice in between and enjoy!
Do you like grilled cheese sandwiches? To me, they are perfect comfort food. Well, anything with melted cheese is, right?
Before I started a low carb diet, I'd use sourdough bread to make grilled cheese. However, bread made with grains is off the menu when you're cutting the carbs. Here's an article that explains why and lists all foods to avoid on Keto.
Of course, it's possible to simply use keto bread recipes for a quick grilled cheese. I have two recipes on my site that work especially well for this - my almond flour bread and this popular low carb everyday bread. Take a couple of slices, add cheddar, under the grill (that's what we call a broiler over here), done!
The thing is, there's not always keto bread in the house. And I'm here to make your life more interesting. See this low carb zucchini grilled cheese as a crazy healthy twist to a cheese sandwich, low carb or not!
Quick side note - here in the UK we do call a zucchini a courgette, but I'm German and in Germany a zucchini is a zucchini so I'm just sticking with that.
I decided on baking the zucchini "bread" in a casserole dish and cutting it into eight slices afterwards. This is simply faster than forming toast sized square patties and baking those.
Another note - I chose using the oven for ease. But in theory, you could also fry the zucchini base in a skillet. In this case, it would probably easier to form patties so you can flip them.
These crispy sandwiches make a filling lunch or simple dinner. You could absolutely add in some ham, parma ham, pepperoni, cooked bacon or chorizo as well!
How to make a keto zucchini grilled cheese sandwich
Here are the ingredients we need. Definitely don't forget to use the herbs and spices as zucchini is a bit of a blank canvas. The parmesan is also essential to the recipe.
Tip: I used pre-sliced cheddar for this recipe. I normally prefer to buy cheddar in a block for quality reasons. However, the standard supermarket sliced cheese melts just extra well!
You can also use mozzarella here for dreamy stringiness!
1.) Grate the zucchini either in a food processor or by hand.
2.) Place the zucchini into a muslin cloth or fine tea towel and squeeze out the water. Discard the water.
You should end up with roughly 3 grated cups after squeezing.
3.) Add the compressed zucchini to a mixing bowl along with the eggs, almond flour, parmesan, spices and seasoning. Mix until all ingredients are thoroughly combined.
4.) Press the zucchini bread mix into your baking tray so it is level and about ¼ inch thick.
Bake for 20 - 25 minutes or until golden on top. Remove the "bread" from the oven and tray and allow to cool slightly on a cooling rack.
5.) Slice the zucchini bake into 8 squares (4 bases and 4 tops). Place cheese in the middle of the base and grill for about 30 - 60 seconds or until it has melted. Top with the other slice and serve.
To warm through the entire zucchini sandwich, pop the top on and grill that too for about 30 seconds. Be careful not to burn it though!
Recipe tips and tricks
Make sure you squeeze as much water as possible out of the zucchini. Squeeze, and squeeze some more. Zucchini is a VERY watery veggie. Taking your time with this will make the ‘bread’ nice and firm.
For the best stringy cheese, pre-sliced cheese works best. I went for a cheddar because I like its salty taste, but gouda would also work well. If you are a mozzarella fan, that's also a good option. It makes the stringiest grilled cheese ever!
Dairy free keto grilled cheese
To make this recipe dairy free, replace the parmesan cheese with nutritional yeast. Instead of the dairy cheese, choose a vegan sliced cheese of your liking.
Cauliflower grilled cheese sandwich
Yes, it is possible to replace the zucchini with cauliflower! To get the same fluffy result, break the cauliflower into florets and steam until tender (about 5 minutes). Alternatively, do this in a microwave!
Then, squeeze all liquid out of the cauliflower and proceed as per recipe.
How to store zucchini grilled cheese
Store the zucchini bread bake in the fridge for up to 3 days. Reheat it in the oven as it will lose its crispness. I recommend to melt the cheese fresh, just before eating.
It is possible to freeze this recipe. It will be moist once you defrost it and you must re-heat it in the oven to crisp it up again.
Don't miss these keto zucchini recipes
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Keto Zucchini Grilled Cheese Sandwich
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- Preheat oven to 200C / 180 fan / 400F. Line a large baking tray with parchment paper. Dimensions 30 x 23 x 2 cm.
- Grate the zucchini either in a food processor or by hand. Place into a muslin cloth or fine tea towel and squeeze out the water. Discard the water.
- Add the compressed zucchini to a mixing bowl along with the eggs, almond flour, parmesan, spices and seasoning. Mix until all ingredients are thoroughly combined.
- Press the zucchini mix into your baking tray so it is level and about ¼ inch thick.
- Bake for 20 - 25 minutes or until golden on top. Remove from the oven and tray and allow to cool slightly.
- Slice into 8 squares (4 bases and 4 tops). Place cheese in the middle of the base and grill for about 30 - 60 seconds or until melted. Top with the other slice and serve. Option to pop the top on and grill that too for about 30 seconds to warm through but careful not to burn it.
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