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Easy Gluten-Free Lemon Slice

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I love easy slice recipes and this quick Gluten-Free Lemon Slice is no exception. Made gluten-free using arrowroot biscuits along with condensed milk and a 3-ingredient lemon icing!

Easy lemon coconut slice on a serving platter
Easy Lemon Coconut Slice Featured Image

Gluten-Free Lemon Slice

Samantha Pickthall
This quick and easy Lemon Coconut Slice is made gluten-free using arrowroot biscuits. Created with condensed milk and a 3-ingredient lemon icing!
4.64 from 25 votes
Prep Time 20 minutes
Chill Time 1 hour
Course Dessert, Slice, Snack
Servings 20 squares
Calories 232 kcal


Biscuit Base

  • 250 g packet plain gluten-free arrowroot biscuits, or plain Marie or Digestive biscuits
  • 1 1/2 cups desiccated coconut
  • 2 tbsp lemon zest, approx. 2 lemons
  • 200 g (3/4 cup) sweetened condensed milk
  • 80 g butter, melted, use unsalted or salted
  • 2 1/2 Tbsp freshly squeezed lemon juice, approx. 1 large lemon

Lemon Icing

  • 2 cups (300g) pure icing sugar
  • 60 g butter, melted, use unsalted or salted butter
  • 2 Tbsp freshly squeezed lemon juice, approx. 1 medium lemon


Gluten-Free Biscuit Base

  • Line a 9 x 9 inch (22cm x 22cm) square baking pan with parchment paper. Set aside.
  • In a high-speed food processor, add biscuits and crush to a crumb.
  • Pour crushed biscuits into a large mixing bowl.
  • Stir through desiccated coconut and lemon zest.
  • Pour in condensed milk, melted butter, and lemon juice. Mix with a wooden spoon or spatula until well combined.
  • Press mixture firmly into the lined pan using a spatula/wooden spoon or your hands.
  • Place into the refrigerator to chill while you make the icing.

Lemon Icing

  • In a medium-sized mixing bowl, sift in icing sugar.
  • Pour in melted butter and lemon juice. Whisk until well combined and smooth, it will be thick.
  • Spread icing over the biscuit base.
  • Return to the refrigerator for 1 hour or until the icing has set. To fasten up the process, chill in the freezer. You can also refrigerate it overnight.
  • Remove the slice from the pan and slice it into squares.
  • Enjoy!


  • Store: In an airtight container, refrigerated, for 1 week. 
  • Freeze: Either the whole slab or in individual slices, in a freezer-friendly container for up to 3 months. Thaw overnight in the fridge or at room temperature for several hours until soft.


Calories: 232kcalCarbohydrates: 27gProtein: 2gFat: 13gSaturated Fat: 10gPolyunsaturated Fat: 0.3gMonounsaturated Fat: 2gTrans Fat: 0.2gCholesterol: 28mgSodium: 97mgPotassium: 79mgFiber: 2gSugar: 21gVitamin A: 203IUVitamin C: 3mgCalcium: 33mgIron: 0.3mg
Keyword coconut, Gluten Free, lemon, lemon slice, no bake
Tried this recipe? Let us know how it was!

Best Lemon Slice Recipes

  • Brighten your day with the zesty flavor of Vegan Lemon Slice, a delicious and refreshing dessert for all to enjoy!
  • This classic Lemon Slice features a delicate shortbread base and a smooth, creamy lemon topping perfect for any occasion!
  • Indulge in the zesty harmony of citrus and cream with Lemon Cheesecake Slice, a deliciously smooth and refreshing baked cheesecake!
  • This easy no-bake Gluten Free Citrus Slice is made with a gluten free arrowroot biscuit base infused with lemon and orange. Topped with a 3-ingredient citrus icing!

Gluten-Free Lemon Slice Recipe

A luscious gluten-free lemon slice is a no-bake slice recipe that is a must-try!

It uses gluten-free sweet biscuits to make the condensed milk biscuit base. Created in one bowl with freshly squeezed lemon juice and lemon zest.

This gluten-free slice stands out as a lunchbox-friendly treat, ideal for both kids and adults. Its no-bake nature appeals to those seeking convenience without sacrificing taste.

The lemon and coconut is a refreshing combination and will soon become your favorite new easy no-gluten free slice recipe. 

Can I make this a dairy-free lemon slice?

Yes, you can make this lemon slice dairy-free by using dairy-free alternatives for condensed milk and butter. Check out my vegan lemon slice recipe, it’s gluten-free as well!

Ingredients needed to make this easy lemon coconut slice

Expert Tips

  • May Need More Condensed Milk: Depending on what biscuits you use, whether gluten-free or regular, more condensed milk may be needed until the biscuit base sticks together and it’s not too crumbly. Through testing I’ve found that you need less condensed milk when using gluten-free biscuits.
  • Sift Powdered Sugar: To remove any lumps. 
  • Lemon Icing Is Thick: Be sure to spread it over the base immediately to prevent it going too hard.
Lemon slice preparation.

Do I have to use gluten-free biscuits?

No, you can use plain Marie Biscuits, plain Digestive Biscuits, or any plain sweet biscuit for this no-bake lemon slice recipe. Just keep in mind you may need an entire can of condensed milk when using regular biscuits.

Can I use bottled lemon juice instead of fresh lemon?

While fresh lemon juice is recommended for the best flavor, you can use bottled lemon juice in a pinch. However, the fresh zest is crucial for that zesty lemon flavor.

gluten free lemon slice assembly.

How do I know when the lemon slice has set properly?

The slice should be firm to the touch and hold its shape when cut. Refrigeration for a few hours or overnight is usually sufficient for it to set properly.

Side image of this no-bake lemon slice

How to Store Gluten-Free Lemon Slice

Store: In an airtight container, refrigerated, for 1 week. 

Freeze: Either the whole slab or in individual slices, in a freezer-friendly container for up to 3 months. Thaw overnight in the fridge or at room temperature for several hours until soft.

If you enjoy this recipe, please consider leaving a ⭐️ star rating and a comment review below. I love to hear what you think and it’s much appreciated. Thank you! Your email address will not be published. Sam x

No bake lemon slice.


  1. I have just offered 36 slices to friends at a choir rehearsal…not one was left, and I have passed on the recipe several times. The slices are delicious. However I do think there is an error in the metric version. Surely 30g of lemon zest should read 3g….. otherwise one would need half a crate of lemons! Three grammes is the amount I used and they tasted very fresh and lemony.

    1. Hi HJ, thank you so much for your feedback and for sharing the slices at your choir rehearsal. I’m thrilled they were a hit! Regarding the lemon zest, it seems there was a misunderstanding about the quantity. For a fresher and more lemony flavor, 2 tablespoons, which is approximately 12 grams, is indeed correct. I will update the recipe on my blog to avoid any confusion in the future. Thanks again for your keen eye and for passing the recipe along! Kindest, Sam 🙂

  2. 5 stars
    I made this with gingernut biscuits and it turned out really well. Will try some of your other recipes at some stage as they all look good.

    1. Hi Liz, I’m glad to hear you made this lemon slice and with gingernut biscuits, I love that idea, sounds so delicious! What a great combination of flavours. Thank you 🙂 Hope you enjoy some more recipes soon. Thanks for sharing, Sam x

4.64 from 25 votes (24 ratings without comment)

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