This gluten-free lemon tart is one of my absolute favourite desserts to make when I have people over. There’s something about that first bite — the shatteringly crisp buttery pastry giving way to a smooth, tangy lemon filling — that just makes everyone go quiet for a moment.
The secret is in the pastry. A touch of xanthan gum gives gluten-free flour the elasticity it needs to roll out beautifully and hold together in the tin without crumbling. The filling is embarrassingly simple — just eggs, sugar, double cream, and the zest and juice of three lemons — but the result tastes like something from a Parisian patisserie.
What I love most about this recipe:
- Naturally gluten-free — no one will guess it’s made without wheat flour
- Only 9 ingredients for the entire tart, pastry included
- Make-ahead friendly — it actually tastes better after chilling overnight
If you’ve been searching for a gluten-free lemon tart that doesn’t taste like a compromise, this is the one to bookmark.
Gluten-Free Lemon Tart
Equipment
- 1 sheet of greaseproof paper (for blind baking)
Ingredients
Pastry Ingredients
- 1 ¾ cups gluten-free plain flour
- 2 tablespoons icing sugar powdered sugar
- ½ teaspoon xanthan gum
- ¼ teaspoon salt
- ½ cup unsalted butter cold, cubed
- 1 large egg beaten
- 2 tablespoons cold water
Filling Ingredients
- 3 large eggs
- ½ cup caster sugar superfine sugar
- ⅔ cup double cream heavy cream
- 3 large lemons zest and juice, zest finely chopped and juice strained
Instructions
Pastry Instructions
- Preheat your oven to 180 degrees Celsius. Grease your preferred tin. (Try and get a loose-bottomed one for your own sake)
- Place flour, xanthan gum, sugar and salt in a bowl, then add the butter and rub it with your fingers until it looks like breadcrumbs.
- Make a well in the middle of your mix, add your eggs and water, then mix it with your hands again. It then forms a lovely dough. Knead it on a floured surface. Wrap in clingfilm and put it in the fridge for 20-30 minutes.
- Remove the dough from the fridge after 20-30 minutes. It should be firm but still pliable enough to roll. Avoid using a freezer to speed this up — the dough becomes too brittle and will crack when rolling.
- Roll the pastry out on a lightly floured surface to about 3mm (1/8 inch) thickness. Carefully drape it over your 9-inch (23cm) loose-bottomed tart tin and press gently into the edges. Trim any excess pastry hanging over the rim.
- Scrunch up some greaseproof paper and add baking beans. Blind bake the pastry case for 12-15 minutes until the edges are lightly golden. Remove the greaseproof paper and baking beans, then return to the oven for a further 5 minutes to dry out the base.
Filling Instructions
- In a large bowl, whisk the eggs and caster sugar together until combined. Add the double cream, lemon zest, and strained lemon juice. Whisk gently until smooth — avoid over-beating as too many air bubbles will prevent a silky set.
- Pour into your pastry case right up near the top.
- Put the pastry back into the oven at 180 degrees Celsius and bake for up to 20 minutes. It can take less time if you put your mix into the hot tin right away (Mine took about 16 minutes doing this). The filling is done when the edges are set but the centre still has a gentle wobble — like a barely-set panna cotta. It will firm up fully as it cools.
- Leave it to cool in the case for 20-30 minutes, and then when you take it out, leave it for another 20 minutes.
Nutrition
What Makes This Gluten-Free Lemon Tart Special
Most gluten-free tarts suffer from the same problem — a sandy, crumbly pastry that falls apart the moment you slice it. This recipe solves that with a small but mighty addition: xanthan gum. Just half a teaspoon gives the gluten-free flour enough structure to roll, press, and bake into a proper shortcrust that holds its shape and snaps cleanly when you cut through it.
The filling is where this tart really shines. Unlike lemon meringue or thick lemon curd tarts, this is a classic French tarte au citron style — a thin, silky layer of lemon custard made with double cream, fresh lemon juice, and zest. It sets with a gentle wobble and has that perfect balance of sharp citrus and smooth sweetness that makes you want another slice before you’ve finished the first.
The beauty is in the simplicity: 9 ingredients, no specialist equipment, and a result that looks and tastes like it came from a patisserie.
Tips for Best Results
- Keep the butter ice-cold. Cut it into small cubes straight from the fridge and work quickly when rubbing it into the flour. Warm butter makes gluten-free pastry greasy rather than flaky.
- Don’t skip the chill time. The 20-30 minutes in the fridge allows the xanthan gum to hydrate fully, giving the dough elasticity. Rush this and the pastry cracks when rolling.
- Blind bake properly. Press the greaseproof paper firmly into the corners of the tin before adding baking beans. After removing the beans, bake the empty case for an extra 5 minutes — this prevents a soggy bottom once the wet filling goes in.
- Strain your lemon juice. Pass it through a fine sieve to catch seeds and pulp. This gives the filling a perfectly smooth, uniform texture.
- Don’t over-whisk the filling. You want it combined and smooth, not frothy. Air bubbles create an uneven surface and can crack during baking.
- Pour on the rack. Place your tart tin on the pulled-out oven rack and pour the filling in there. No spills, no wobbly walk to the oven.
Substitutions and Variations
- Dairy-free version: Replace the double cream with full-fat coconut cream (the thick part from a chilled tin). Use dairy-free block butter such as Naturli or Flora Plant in the pastry. The coconut flavour is barely noticeable against the strong lemon.
- Different citrus: Swap the lemons for 4 limes for a gluten-free key lime tart, or use a mix of 2 lemons and 1 blood orange for a stunning colour and mellower flavour.
- Sugar alternatives: Replace the caster sugar with coconut sugar for a deeper, caramel-like sweetness. The filling will be slightly darker in colour.
- Egg-free pastry: The pastry egg can be replaced with 2 tablespoons of cold water mixed with 1 tablespoon of ground flaxseed — let it gel for 5 minutes before adding. The filling requires eggs for setting and cannot be made egg-free.
- Extra decoration: Dust with icing sugar before serving, top with fresh raspberries, or add a thin layer of Italian meringue torched with a kitchen blowtorch for a gluten-free lemon meringue tart.
Storage and Reheating
- Room temperature: The finished tart can sit at room temperature for up to 2 hours after cooling. Beyond that, refrigerate to keep the custard filling safe.
- Fridge: Cover loosely with cling film or place in a large airtight container. Keeps well for up to 3 days. The pastry softens slightly after day one but the flavour actually improves overnight as the lemon filling mellows.
- Freezing: Freezing the assembled tart is not recommended — the custard filling can weep and become watery upon thawing. However, you can freeze the blind-baked pastry case (wrapped tightly in cling film then foil) for up to 1 month. Thaw at room temperature, then fill and bake fresh.
- Reheating: This tart is best served at room temperature or slightly chilled. If you prefer it warm, place slices in a 150°C / 300°F oven for 5 minutes — just enough to take the chill off without melting the filling.
What to Serve With This Gluten-Free Lemon Tart
This tart is rich enough to stand on its own, but a few well-chosen accompaniments elevate it from lovely to truly special:
- Crème fraîche: A dollop on the side cuts through the sweetness and adds a tangy contrast that complements the lemon beautifully.
- Fresh berries: Raspberries, blueberries, or sliced strawberries add colour, freshness, and a textural contrast to the silky filling.
- Whipped cream: Lightly sweetened with a touch of vanilla — keep it simple so the lemon stays the star.
- Espresso: A strong black coffee alongside a slice is the classic French way to finish a meal. The bitterness against the sweet-tart filling is exceptional.
- Dessert wine: A Sauternes or late-harvest Riesling pairs beautifully — the honeyed sweetness of the wine echoes the lemon without overwhelming it.
Frequently Asked Questions
Can I use a food processor to make the pastry?
Yes, and it’s actually a great option for gluten-free pastry. Pulse the flour, icing sugar, xanthan gum, salt, and cold butter cubes until you get a breadcrumb texture, then add the egg and water and pulse until it just comes together. The food processor keeps everything cold, which is exactly what you want for crisp pastry.
Why did my pastry crack when rolling?
Gluten-free pastry cracks more easily than wheat-based dough because there’s no gluten network to hold it together. The most common causes are: the dough was too cold (let it sit for 5 minutes at room temperature before rolling), it wasn’t kneaded enough (the xanthan gum needs a little kneading to activate), or there wasn’t enough water. If cracks appear, simply press them back together with wet fingers — gluten-free dough is very forgiving and patches won’t show after baking.
How do I know when the filling is done?
The filling is ready when the edges are fully set but the centre still has a gentle wobble — like a barely-set panna cotta. This usually takes 16-20 minutes at 180°C / 350°F. The residual heat in the tart will continue cooking the centre as it cools. If you bake until the centre is completely firm, the filling will be overcooked and may crack.
Can I make this tart the day before?
Absolutely — this tart is actually better the next day. The lemon flavour mellows slightly and the filling sets to a firmer, more sliceable consistency. Make it in the evening, let it cool completely, then cover and refrigerate overnight. Remove from the fridge 20-30 minutes before serving to take the edge off the chill.
What size tart tin should I use?
This recipe is designed for a 9-inch (23cm) loose-bottomed fluted tart tin. A loose bottom is important — gluten-free pastry is more fragile than regular pastry, and trying to flip a tart out of a solid tin risks breaking the crust. If you only have an 8-inch tin, you’ll have a slightly thicker layer of filling which may need 2-3 extra minutes of baking time.
Can I use bottled lemon juice instead of fresh?
Fresh lemon juice makes a noticeable difference in this recipe. Bottled lemon juice has a flatter, more acidic taste and lacks the bright aromatic quality that fresh lemons bring. You also need the lemon zest, which is where most of the essential oils and fragrance live. Three medium lemons should give you roughly 90-100ml of juice and plenty of zest.
Why is xanthan gum necessary?
Xanthan gum acts as a gluten substitute in the pastry — it provides the binding and elasticity that gluten would normally give. Without it, the pastry would crumble apart and be impossible to roll. Only half a teaspoon is needed; too much makes the dough gummy and chewy. If you can’t find xanthan gum, check if your gluten-free flour blend already contains it — some brands like Doves Farm add it to their mixes.
A Brief History of the Lemon Tart
The tarte au citron has been a staple of French patisserie since at least the 19th century, though lemon-based desserts appeared in European cookbooks as far back as the medieval period when lemons were an expensive luxury imported from the Middle East and North Africa. The classic French version — a thin shortcrust shell filled with a simple lemon custard — became the gold standard in Parisian bakeries and remains one of the most popular desserts in France today.
What sets the French lemon tart apart from its British or American cousins is restraint. There’s no meringue piled on top, no thick curd, no cream cheese. Just pastry, lemon, eggs, sugar, and cream — each ingredient given room to speak. Adapting this classic for a gluten-free diet means the pastry needs a little extra help from xanthan gum, but the filling remains exactly the same as it has been for generations.
If you try this gluten-free lemon tart, I’d love to hear how it turned out — leave a star rating and a comment below to let me know!
