Easy Zucchini Slice Without Flour

Our easy Zucchini Slice recipe is a firm family favourite. With just a handful of budget-friendly ingredients, you can easily make this versatile meal in minutes.
Before jumping to the recipe please note that the below information contains HOT TIPS for this recipe. We try and answer all your questions to guarantee a perfect keto recipe every time.

Why You’ll Love This Recipe

Tasty – This zucchini slice is not only easy and quick to make, but it is delicious! perfect as a meal or cut into small pieces for finger food when entertaining!

Kid friendly – this is a perfect meal for kids lunches or dinners. Zucchini has very little flavour and it is a great way to add hidden vegetables into kids diet.

Gluten free – I follow a low carb keto lifestyle so this zucchini slice is made with no flour. It is gluten-free, grain-free and a diabetic-friendly meal.

Keto friendly – Leaving out the flour also makes this an easy keto recipe perfect for any time of the day.

Versatile – this recipe can be baked in the oven or air fryer. It has been tested on a barbecue and in a waffle maker. You can add more spices and make it gourmet or simple 4 ingredient zucchini slice. It is just so easy to make different each time. Experiment and find your favourites.

What is Zucchini Slice?

A zucchini slice might also be referred to as impossible quiche, zucchini frittata, or crustless quiche. Usually, a quiche has more dairy like cream or sour cream added to the eggs and a frittata has less dairy and more filling.

The differences are only subtle, but here in Australia most of us have enjoyed a zucchini slice at some point in time.

Related recipes Zucchini Pizza Bites / Easy Keto Beef Lasagna

Zucchini Slice Ingredients

Scroll to the bottom of this post for the quantity of each ingredient used in our bacon and zucchini slice recipe.

Ingredients for a zucchii slice on a dark green backdrop.

Bacon – I use rindless bacon or trim the rind off for this recipe. Seeing that the bacon is not cooked until crispy I would prefer not to be chewing on rubbery rind in the slice. The bacon can be left out for a vegetarian zucchini slice.

Zucchini – I do grate the zucchini and prefer to do this by hand even if using the Thermomix. I squeeze out the excess water so the slice is not too wet or watery. I have tested the recipe without squeezing and with and I much prefer it with it squeezed. Slicing zucchini into ribbons or using a spiraliser to make spiralised zucchini noodles is a great way to change up the look and texture of the slice too.

Hemp seeds – the hemp seeds are a great alternative for the usual plain or self raising flour in a recipe for zucchini slice. They help absorb excess moistureThey are optional in this recipe. Some keto zucchini slice recipes use almond meal or almond flour in place of flour but I find no need for it.

Cheddar – I sometimes make this one cup grated cheddar cheese and a quarter cup of parmesan for extra flavour. You can use any cheese you love. Our original recipe in Lunch Time Keto uses cheddar, parmesan and feta.

Seasoning – season well with salt and pepper. You can also add any extra spices you like. I did add an optional Ranch Seasoning to this recipe, but a zucchini slice with curry powder is always popular, or add in some chilli flakes or a bit of lemon pepper, whatever you prefer!

How To Make It

Step 1. Preheat oven to 170 ̊C/375°F. Line a 26cm x 20cm (10″ x 8″) baking dish with baking paper. Dice the onion and bacon. Heat the oil in a large skillet over medium-high heat. Add the bacon and onion; sauté until lightly golden. Transfer to a large mixing bowl.

Step 2. Place the grated zucchini between paper towels or a clean kitchen cloth. Squeeze the water from the zucchini and discard. Place into the bowl with the bacon. Add remaining ingredients, season well, and mix to combine.

Step 3. Pour into the prepared baking dish. Bake for 35-40 minutes or until cooked through.

Thermomix Zucchini Slice

Making our gluten free zucchini slice in the Thermomix is so easy. The full method is on the printable recipe card below. I have included cooking the bacon and onion in the mixer, but if you prefer to fry them in a skillet first then add to the mixer then go for it.

This recipe is also suitable to be made in any thermal cooker such as the Magimix, Intelli Smith and Noble etc. It can be doubled or halved. You could even steam it whole or in a silicone mould in your mixer too. That would be perfect for those of you who take your Thermomix camping or caravanning too.

Variations

Vegetarian Zucchini Slice – leave out the bacon. I also love grated pumpkin in this recipe. No need to cook it, just grated or spiralise pumpkin or squash (or even spaghetti squash noodles) and fold it in before baking.

Zucchini Slice without flour – this is also a great keto zucchini slice recipe. No flour is needed at all.

Gourmet Zucchini Slice –  to totally pimp your zucchini slice add some garlic, chili powder (or fresh chillies), extra spiralised vegetables, goats curd, chorizo, pancetta and so much more. 

Zucchini Waffles, Zucchini Chaffles, and Zucchini Muffins – there are so many other ways you could make and bake this easy zucchini slice recipe. Pull out all those gadgets you have locked away and make zucchini slice pancakes, zucchini slice pies (use your pie maker to make zucchini slice pies) and soooo many more appliances you can use to make it your way.

Zucchini waffles served with avocado.

FAQs

Is Zucchini Slice suitable to freeze?

It sure is. Store in a ziplock bag in individual portions. Defrost in the fridge overnight.

Do I need to squeeze the zucchini before adding?

I have made the recipe both ways and it is a little “wet” if the zucchini is not squeezed. This is different to a traditional zucchini slice made with plain flour as the flour absorbs the zucchini juices. Squeezing out the zucchini will help give the slice more stability.

Can I cook zucchini slice in a slow cooker?

Yes, you can. Spray and line the slow cooker (or use a silicone dish that fits your slow cooker). Pour the mixture in and cook on high for 1-2 hours.

What To Serve With It

The slice is perfect just on its own. Serve with a light salad for an easy meal, or add it to a bigger salad like our Keto Roasted Pumpkin Salad with Lemon Yogurt for something more substantial.

Dressings like our Ranch Dressing, Cilantro Chimichurri, or Easy Keto Mayonnaise are perfect sauces to accompany it too.

More Recipes To Try

We all love easy cheap keto meals that the whole family will love, right? I sure do. Here are just a few simple keto dinner recipes you might also like to try.

  1. Savoury Mince
  2. Country Style Boneless Pork Ribs
  3. Homemade Healthy Beef Stew
  4. Marry Me Chicken
  5. Keto Salmon Patties
  6. Devilled Sausages
A stack of zucchini quiche slices on a piece of baking paper.
Keto Meal Plans & Support

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Four slices of zucchini slice stacked on top of each other on a sheet of baking paper.

Easy Zucchini Slice

You will just love this easy Zucchini Slice recipe. Quick, budget-friendly, gluten-free and a meal everyone loves!
5 from 124 votes!
Prep Time: 10 mins
Cook Time: 35 mins
Total Time: 45 mins
Course: Lunch and Dinner
Cuisine: Australian Keto
Diet: Diabetic, Gluten Free
Recipe Category: Low Carb
Calories: 206kcal
Author: Megan Ellam
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Servings: 8 serves
Tap or hover over number to scale ingredients
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Ingredients

  • 1/2 onion
  • 4 rashers streaky rindless bacon
  • 1 tablespoon olive oil
  • 350 g zucchini grated
  • 7 eggs
  • 1 cup shredded cheddar
  • 2 tablespoons chopped fresh parsley
  • 2 tablespoons hemp seeds optional
  • 2 teaspoons Ranch Seasoning optional
  • Salt and pepper

Instructions

CONVENTIONAL METHOD

  • Preheat the oven to 170 ̊C/375°F. Line a 26cm x 20cm (10″ x 8″) baking dish with baking paper.
  • Dice the onion and bacon. Heat the oil in a large skillet over medium-high heat. Add the bacon and onion; sauté until lightly golden. Transfer to a large mixing bowl.
  • Place the grated zucchini between paper towels or a clean kitchen cloth. Squeeze the water from the zucchini and discard. Place into the bowl with the bacon. Add remaining ingredients, season well, and mix to combine. Pour into the prepared baking dish. Bake for 35-40 minutes or until cooked through.

THERMAL METHOD

  • Preheat the oven to 170 ̊C/375°F. Line a 26cm x 20cm (10″ x 8″) baking dish with baking paper.
  • (Pre-grate the zucchini – place roughly chopped zucchini into the mixer; chop 4 sec/speed 4. Place the grated zucchini between paper towels or a clean kitchen cloth. Squeeze the water from the zucchini and discard.)
  • Place the onion, bacon, and oil into the mixer; chop 4 sec/speed 4. Scrape down the sides of the bowl; cook 4 min/120°C/reverse/speed 1.
  • Add the remaining ingredients, season well; mix 5 sec/speed 4. Pour into the prepared baking dish. Bake for 35-40 minutes or until cooked through.

Notes

Healthy Zucchini Slice Ingredients
Bacon – I use rindless bacon or trim the rind off for this recipe. Seeing that the bacon is not cooked until crispy I would prefer not to be chewing on rubbery rind in the slice. The bacon can be left out for a vegetarian zucchini slice.
Zucchini – I do grate the zucchini and prefer to do this by hand even if using the Thermomix. I squeeze out the excess water so the slice is not too wet or watery. I have tested the recipe without squeezing and with and I much prefer it squeezed out. Slicing zucchini into ribbons or using a spiraliser to make with spiralised zucchini noodles makes for something different too.
Hemp seeds – the hemp seeds are a great alternative for the usual plain or self raising flour in a recipe for zucchini slice. They help absorb excess moisture. They are optional in this recipe. Some keto zucchini slice recipes use almond meal or almond flour in place of flour but I find no need for it.
Cheddar – I sometimes make this one cup grated cheddar cheese and a quarter cup of parmesan for extra flavour. You can use any cheese you love. Our original recipe in Lunch Time Keto uses cheddar, parmesan and feta.
Onion – I use just half a large onion finely chopped but you can add more or a combination with some finely sliced green onion as well.
This recipe yields approximately 6-8 servings. The actual number of servings will depend on your preferred portion sizes. 
To calculate the weight of one serving, prepare the recipe as instructed. Weigh the finished recipe, then divide the weight of the finished recipe by 6-8. The result will be the weight of one serving. 
Nutritional values shown are a guideline only. They are for 1 serving using the ingredients listed. 
All recipes have been tested using all of the cooking methods included by various recipe testers.
You can freeze zucchini slice. Store it in the fridge for a max of 3-4 days or freeze in individual portions for simple lunches and dinners.
 
The recipe card instructions contain the most basic of steps and a list of ingredients. If you have any queries, questions or are unsure of substitutions, please scroll up to the blog post for more information.
Zucchini Slice Variations – here are just a few of my favourite ways to bake, make, and flavour a simple zucchini slice.
Vegetarian Zucchini Slice – leave out the bacon. I also love grated pumpkin in this recipe. No need to cook it just grated or spiralise pumpkin or squash (or even spaghetti squash noodles) and fold it in before baking.
Zucchini Slice Thermomix – this is such an easy recipe to make with your Thermomix. This zucchini slice with bacon is suitable to make in the TM6, TM5 and TM31. 
Zucchini Slice without flour – this is also a great keto zucchini slice recipe. No flour needed at all.
Gourmet Zucchini Slice –  to totally pimp your zucchini slice add some garlic, chili powder (or fresh chillies), extra spiralised vegetables, goats curd, chorizo, pancetta and so much more. 
Zucchini Waffles, Zucchini Chaffles, and Zucchini Muffins – there are so many other ways you could make and bake this easy zucchini slice recipe. Pull out all those gadgets you have locked away and make zucchini slice pancakes, zucchini slice pies and soooo many more ideas.

Your Own Notes

Nutrition

Serving: 1serve | Calories: 206kcal | Carbohydrates: 3g | Protein: 12g | Fat: 16g | Saturated Fat: 6g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 6g | Trans Fat: 1g | Cholesterol: 165mg | Sodium: 224mg | Potassium: 216mg | Fiber: 1g | Sugar: 2g | Vitamin A: 545IU | Vitamin C: 10mg | Calcium: 137mg | Iron: 2mg | Magnesium: 19mg | Net Carbs: 2g
Tried this recipe?Mention @meganellam or tag #madcreations!

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    102 Comments

  • Shilpa says:

    5 stars
    I skipped the bacon and made vegetarian zucchini slice. Turned out delicious. Thanks for this recipe.

  • Lynn Polito says:

    5 stars
    This is perfect for all my zucchini in the garden! It is so delicious!!

  • Kate says:

    5 stars
    This was so easy to make and it tasted great. Thanks for the recipe. I will be making it again!

  • Kym S says:

    5 stars
    Wow! Sooooo gooood!! The first time I made this, I didn’t have any onions, so I subbed 1 tblsp of dried onion flakes and let them sit in the egg mix for about 10 mins to hydrate and moisten them. It was a good sub and one I’ll keep in mind for future. For the second one, I had brown onion… next – level – WOW! I served it with a crisp savvy blanc 😉 Definitely the best keto zucchini slice ever!

  • Di says:

    5 stars
    Wow Megan……. My husband turned his nose up when I said we were having zucchini slice for dinner 😂
    He didn’t stop raving about it during, after and again today! He’s requested this be a weekly dinner. Can’t say I disagree…. It’s so easy, delicious and extra tasty, served cold today.
    Thanks, you’re a champion.

  • Eileen Coleman says:

    5 stars
    Wow Megan! This slice is so good! I used to make one with flour, but this is so much better. Thanks, Megan – another one that will go into regular rotation. Looking forward to having a slice for lunch and the rest will go into the freezer for now. 5 stars from the hubster and me. 😋😋😋

    • Megan Mad Creations Hub says:

      Yay! 5 stars ***** Thanks Eileen. So happy you and the hubster are enjoying the recipes

  • Amanda Mason says:

    5 stars
    I’ve been making this recipe every Sunday for about 2 month and it’s perfect for brunch! The ranch seasoning is a fantastic flavor add and everyone has been enjoying it!!

    • Megan Mad Creations Hub says:

      Yay! That is so cool to hear that you are enjoying regularly Amanda. I want to make more recipes that are simple and enjoyed often.

  • Debra says:

    Just taken this out of the oven can’t wait to try it I didnt have enough zucchini so added some roasted capsicum and only used 6 eggs as my eggs are XL and I used mozzerella cheese

  • Karen says:

    5 stars
    Delicious! I was looking to use up some zucchini from my garden and came across this recipe. Loved the surprising addition of ranch to season everything up. The entire family loved it- will make again!

  • Bronwyn McDonald says:

    Thank you for adding the Thermomix instructions. Wonderfully written.

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