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Home ยป All Recipes

Thermomix Lemon Delicious Slice

Published: Nov 30, 2019 ยท Modified: Mar 8, 2025 by Julie Carlyle ยท This post may contain affiliate links ยท 7 Comments

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Pinterest Titled image lemon delicious slice on a white background

Lemon delicious slice is a zingy curd-like custard slice on a baked, buttery biscuit base. This is a simple Thermomix lemon slice recipe that the whole family will love!

Square image of lemon slice with a flower vase behind on white backgraound

This is one of my favourite retro treats! I have a weak spot for all lemon desserts actually. I used to make this recipe in my food processor as it was much easier than making it by hand. Now that I have a Thermomix I no longer own a food processor and happily this slice even easier to make in the Thermomix.

Gluten-Free Lemon Delicious Slice

I have a friend who highly sensitive to gluten and is on a strictly Gluten-free diet. He has a sweet tooth so I wanted to make a dessert that was safe for him to eat and super delicious! I trialled this recipe substituting White Wings Gluten-free flour with the regular flour. The recipe was a straight swap between the flours and turned out perfectly. I couldn't find any taste or texture difference between the two slices. 

Step By Step Lemon Slice

3 Images showing the stages of making the Lemon delicious slice
Two images showing the ingredients and filling for the lemon slice

If you're looking for more desserts take a look at some of my favourites!

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Apple Streusel Slice
Nutella Fudge Brownie w Raspberries
Nutella Fudge Brownie w Raspberries

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Overhead image Thermomix lemon slice

Overhead image Thermomix lemon slice

Lemon Delicious Thermomix Slice

Julie Carlyle
Lemon Delicious Slice is a zingy curd-like custard slice on a baked, buttery biscuit base. This is a simple Thermomix lemon slice recipe that the whole family will love! #Thermomix #dessert #Lemon #lemonslice
Print Recipe
Prep Time 10 minutes mins
Cook Time 45 minutes mins
Resting time 30 minutes mins
Total Time 1 hour hr 25 minutes mins
Course Dessert, Snack
Cuisine Australian
Servings 28 slices
Calories 165 kcal

Equipment

  • 1 Thermomix
  • 1 Citrus Lemon Squeeze (press)

Ingredients
 
 

Base

  • 80 g sugar
  • 115 g butter cubed
  • 140 g plain flour  *sub for GF Flour in necessary
  • 70 g coconut

Curd Filling

  • 300 g caster sugar
  • 55 g cornflour *check GF if required
  • 4 eggs
  • 100 g lemon juice Approx 3 lemons depending on size and juice

Instructions
 

Base

  • Line a slice tray 27.5cm x 17.5cm x 3.5cm with paper and preheat the oven to 180 degrees fan-forced.
  • Place the sugar in TM Bowl. Mill 10 sec/Speed 9.
    80 g sugar
  • Add the butter to the sugar. Heat 2 min/80 degrees/Speed 2.
    115 g butter
  • Add flour and coconut to TM bowl. Process 10 Sec/Speed 5.
    140 g plain flour , 70 g coconut
  • Scrape down bowl. Repeat 10 Sec/Speed 5. Repeat if necessary.
  • Transfer the biscuit base into prepared tray. Press the crumb down until smooth.
  • Bake 15-20 minutes or until golden.

Lemon Curd Filling (Without cleaning the bowl!)

  • Add sugar to TM bowl. Mill 10 Sec/Speed 9.
    300 g caster sugar
  • Add remaining ingredients to TM Bowl. Combine 15 sec/ Speed 5.
    55 g cornflour, 4 eggs, 100 g lemon juice
  • Scrape down the bowl. Heat lemon custard. 7 min/80 degrees/Speed 3
  • Pour the filling over the biscuit base and return the slice to the oven immediately.
  • Cook for 15-20 minutes or until the slice is cooked but still has a wobble.
  • Refrigerated the slice once cooked.
  • Cut after the slice has been refrigerated.

Notes

The slice will set further once refrigerated.
If you would like to ensure the slice is GF make sure only pure milled sugar is used to dust the slice.

Nutrition

Calories: 165kcalCarbohydrates: 25gProtein: 2gFat: 6gSaturated Fat: 4gCholesterol: 39mgSodium: 61mgPotassium: 26mgFiber: 1gSugar: 17gVitamin A: 212IUVitamin C: 2mgCalcium: 7mgIron: 1mg
Keyword Dessert, Lemon, Lemon Bar, Lemon Slice, Lunchbox, slice, Thermomix Slice
Tried this recipe?Let us know how it was!
Landscape image of lemon slice cut into bars on a cooling rack.

I hope you have enjoyed this story. Feel free to leave a comment or start a discussion. If you have made a dish from this site I would love to know what you thought!

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Thank you for stopping by,

Happy Cooking

j xx

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Comments

  1. Betty heyward says

    July 30, 2024 at 3:22 pm

    5 stars
    Just made the slice. Canโ€™t wait to try.itโ€™s in the fridge so will try after dinner tonight. Love all your. Cooking and tips thanks.

    Reply
  2. Deanne Cumming says

    May 03, 2020 at 1:43 pm

    Can this be frozen afterward?

    Reply
    • Julie Carlyle says

      May 04, 2020 at 10:25 am

      Hi Deanne
      I have never tried freezing the slice but I can't see why it would be a problem.
      Julie

      Reply
  3. Nicole Keeley says

    March 06, 2020 at 3:52 am

    Hi Julie, I love your stuff and would like to do this for a bake sale instead of the standard and very sweet lemon coconut slice. Wondering how it would go out of fridge in Victoria atm? Fete goes from 4-8pm. Thanks

    Reply
    • Julie Carlyle says

      March 16, 2020 at 12:52 pm

      Hi Nicole
      Thank you so much for your lovely comment. I don't think this recipe would be suitable for a bake sales when the slice warms up it becomes more delicate.
      Sorry Julie

      Reply
  4. Dawn watt says

    November 30, 2019 at 7:31 pm

    Yum cooking this week

    Reply
    • Julie Carlyle says

      November 30, 2019 at 8:38 pm

      I hope you like it ๐Ÿ™‚

      Reply

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Hi, I'm Julie, a recipe developer, published cookbook author, and registered nutritionist. My first love has always been cooking and food. ThermoKitchen is where my love of food combines with a "lazy streak" as I utilise my favourite appliance, the Thermomix! I discovered Thermomix in 2014 and loved it so much I became a consultant for the brand.

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