Classic Lunchbox Thermomix Zucchini Slice

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The Thermomix Zucchini slice is one of my favourite “go to” recipes. It’s packed with healthy zucchini plus the bacon & cheese makes it irresistible. 

Close up view of individual zucchini slice on white plate and background

Whenever I’m looking for a quick, healthy meal to serve I inevitably fall back on this dish.

The recipe ticks all my boxes, it’s delicious, quick to make and everyone always LOVES it! The best part is it includes hidden vegetables, plus the leftovers make a great lunchbox idea. There is always a fight over who gets to take the leftovers to lunch or school.

2 pieces of Zucchini slice on a white plate

Zucchini Slice Tip

  1. This recipe freezes well so if you’re one of these super organised mums you could make and freeze the recipe ahead of time. Cut the slice into serving sizes before freezing. The individual portions can be used for school lunches, or single serve dinners on busy nights.

    Unfortunately, I have never been that organised, so my tribe fights it out for the measly leftovers.

  2. Note I’ve made the Thermomix zucchini slice in a slice tray and a mini loaf tin. If you do use a loaf tin make sure you line it with baking paper so it doesn’t stick.  You could also make these in large muffin trays with cupcake wrappers. The cooking times will alter depending on what tray you use.

Serving Suggestion

The zucchini slice makes a “figure friendly” main meal when served with a large, fresh salad.

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Close up view of individual zucchini slice on white plate and background

Classic Thermomix Zucchini Slice Recipe

Julie Carlyle
This has been one of my most popular recipes because it's simple and delicious! 
5 from 13 votes
Prep Time 10 mins
Cook Time 45 mins
Total Time 55 mins
Course Main Course
Cuisine Australian
Servings 12 Slices
Calories 274 kcal


  • 550 gm zucchini
  • 220 gm onion
  • 250 gm bacon
  • 200 gm cheese (block)
  • 1 cup SR flour
  • 1/4 cup oil
  • 5 eggs


  • Preheat the oven to 180 degrees celsius and line a baking tray with baking paper.
  • Cut the cheese into large cubes and add it to the TM bowl. Grate 2 sec/speed 7.
  • Remove the cheese from the TM bowl and reserve it for later in a large bowl.
  • 1/4 the onion and add it to the TM bowl. Blitz 3sec/speed 7.
  • Remove the onion from the TM bowl and reserve it into a small bowl.
  • 1/4 the zucchini's and add it to the TM bowl. Blitz 3sec/speed 5.
  • Remove the zucchini from the TM bowl and add it to the bowl of onions.
  • Squeeze the excess liquid from the onion and zucchini and combine it with the cheese in the larger bowl.
  • Add the bacon to the TM bowl. Blitz 3sec/speed 5.
  • Remove the bacon and add it to the reserved onion, cheese and zucchini mixture.
  • Crack the eggs into the zucchini mixture, add the flour and oil. Stir by hand until just combined.
  • Pour the mixture into the prepared tray and bake for 40- 45 minutes or until the slice is golden and feels cooked through when pressed in the centre.
  • The slice is delicious served hot or cold. 


The zucchini slice makes a great lunch idea and can be frozen in serving portions.
[clickToTweet tweet="'Perfect Make-ahead lunch idea! Cheesy Zucchini Slice'" quote="'Perfect Make-ahead lunch idea! Cheesy Zucchini Slice'"]


Calories: 274kcalCarbohydrates: 11gProtein: 10gFat: 20gSaturated Fat: 7gCholesterol: 99mgSodium: 272mgPotassium: 240mgFiber: 1gSugar: 2gVitamin A: 365IUVitamin C: 9.6mgCalcium: 145mgIron: 1.2mg
Tried this recipe?Let us know how it was!

More School Lunchbox Idea

Would you like some more delicious recipe? Why not join our little Thermo community on Facebook; Thermokitchen has a group page which allows bloggers and readers to share their own Thermomix recipes.

Landscape image of zucchini slice in the foreground and a large tray of slice in the background

Enjoy the recipe and have a lovely day 🙂

30 thoughts on “Classic Lunchbox Thermomix Zucchini Slice”

  1. Lisa says:

    5 stars
    My kids love this recipe!

  2. Mary Nanci Díaz López says:

    5 stars
    Me gustaría poder traducir a español estás recetas

    1. “I wish I could translate into spanish are recipes”

  3. Megan M says:

    5 stars
    The supermarket had run out of zucchini so I supplemented with kale- delicious.
    Would try it with other veggie options in future!

    1. What a fabulous idea!!

  4. Katia says:

    5 stars
    Thanks for the recipe! Very good, we will make again. For beginner cooks, though, you forgot to mention that bacon needs to be cooked already before adding to mixture, and to add salt/pepper to taste (mine was a bit bland).

    1. Hi Katie, thank you for your message. I love hearing from people that have made my recipes. I will add salt and pepper to taste to the recipe. I actually don’t add salt as I find the bacon is salty enough. The bacon point is interesting, I’ve never cooked the bacon first. I’ve been making this slice since it first “came out” in the early 80’s and even the original recipe included raw bacon. I’m wondering if cooking the bacon first took some of the salt and oils out of the slice and made it on the bland side. Also the oil from the bacon is needed for the texture and flavour ofthe slice.I would love you to try the recipe again with raw bacon and let me know what you think. Once again, thank you so much for your message. I will amend the recipe to make it easier to follow. Julie xx

  5. Karen says:

    5 stars
    Wow best zucchini slice I have ever made, I added a little salt,pepper and chili flakes!
    Absolutely delicious, thank you sharing your recipe ?

    1. I’m so pleased to hear that Karen! Thank you for sharing 🙂

  6. Steve says:

    5 stars
    Wow, this was a fantastic find – delicious! Many thanks

    1. Hi Steve, I’m so pleased you enjoyed the recipe, thanks so much for coming back and leaving a message and a rating. This is one of my favourite quick recipes ?

  7. Eva says:

    5 stars
    Without a doubt – the very best zucchini slice I’ve ever made/eaten … thanks for sharing!
    I used a nylon straining bag (nut milk bag) to squeeze out the ‘onion/zucchini mix’ liquids -peeerfect.
    Precooked the bacon in the Thermomix – 3 mins/100/reverse/speed 1 (2 min’s with MC on -1 min with MC off).
    Strained fat/liquid from cooked bacon.
    And … I used half tasty cheese/half parmesan.
    Yum … and thanks again!

    1. Hi Eva! I’m so pleased you enjoyed the recipe. by pre-cooking the bacon you will have removed some of the fat from the recipe. This will make it a leaner, healthier dish. Personally, I’m naughty and allow the bacon to cook in the slice adding fat and flavour. The dish is fabulous regardless which method is used but I’m so pleased you pointed out that way of cooking as I’m sure it will appeal to readers who are conscious of calories 🙂
      Thanks again and happy cooking
      Julie xx

  8. Lien L says:

    5 stars
    Thanks Julie for sharing this recipe! Best zucchini slice ever! I tripled the recipe to make a big batch in two large baking trays, added salt and pepper to taste, cooked bacon first, squeezed zucchini & onion, and added a bit of carrots as well! It was super morish !

  9. meg says:

    5 stars
    Just made this and its delicious
    I added the salt and pepper from the comments (didn’t cook bacon first, aint nobody got time for that) and added a small tin of corn kernels.

    my mums makes an old school version of this and I love it but could never be bother to grate up a tonne of zucchinis, so im happy ive found a cheats way

  10. meg says:

    5 stars
    ahhh sorry meant to be 5 stars

  11. Agatha says:

    Can you substitute the bacon for a non-meat alternative?

    1. Hi Agatha,
      Yes you can substitute the bacon for 3/4 cup of sun dried tomatoes. It’s still absolutely delicious.
      Happy Cooking

  12. Susan says:

    Could one make this gluten free by using gluten free flour?
    How many slices can I get ?

    1. Yes, I have made this with Gluten Free flour and it has worked perfectly.
      Happy Cooking

  13. Susan says:

    What a great recipe. Thank you.
    Made muffin size ones (24), omitted bacon & substituted with carrot. Added a little salt, black pepper & basil.
    Cooked for 20mins..
    Fantastic. Ready to be delivered to a customer who wanted courgette muffins.
    Hope she will be pleased with them.
    Had to make another batch for hubby as he said they were sooo good. 👏👏

  14. Lyndall says:

    5 stars
    My grandson keeps asking me to make this, he loves it so much. Oh if only he know the main ingredient :- )

    Think is going to be my ‘go to’ recipe for his lunch when he starts prep later this mth. I’m hoping to get organised and have a freezer packed ready to go.

    1. Hi Lyndall,
      That is fabulous to hear!!! I’m so pleased your grandson enjoys this. It’s a great dish, and so portable 👍🏻👍🏻👍🏻
      Happy cooking

  15. tracey says:


    I was wondering why the inside of the zucchini slice is still very moist and soggy despite putting in the oven for > 45min?

    1. Hi Tracey, as the zucchini is moist, you must wring it out after chopping to remove as much of the liquid as possible to prevent the slice being moist and soggy. If you find it moist, try leaving it in the oven at a lower temp (ie, 100*) for 10-15 minutes to remove the moisture

  16. Jennifer Simao says:

    Could you use almond flour to make it Keto?

    1. Hi Jennifer
      I haven’t
      Used almond flour in this recipe so I really don’t know what effect it would have. Please let me know if you make the swap successfully.

  17. Frieda says:

    Stupid question – what’s a TM bowl?

    1. Hi Frieda
      This isn’t a silly question TM bowl means Thermomix bowl.
      Happy cooking

  18. Emma Ryan says:

    5 stars
    This was delicious. I didn’t have 550 grams of zucchini so I had zuchinni brocolli, carrot and corn make up the 550g. The key really is getting rid of the moisture. I added some vegetable stock and the kids couldn’t get enough

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