Lemon Sandwich Cookies With Curd

The kitchen filled with this incredible citrus perfume while I was testing these cookies, and my roommate actually poked her head in asking if I was making lemon bars. That's how intense and lovely the lemon zest smells when you're rubbing it into the sugar. These little sandwiches became my go-to spring baking project after I realized nobody could tell they were gluten-free or vegan.

I brought a batch to my friend's garden party last April, and her aunt who's been gluten-free for years actually grabbed my arm and asked what brand of cookies I'd bought. When I told her I made them, she made me promise to send the recipe. Now they're the only thing anyone requests when we have summer picnics.

• Gluten-free all-purpose flour blend: I've tested several brands and really like the ones that include xanthan gum for better structure
• Almond flour: Adds such a nice nutty sweetness and helps keep these cookies tender without being gritty
• Solid coconut oil: Make sure it's not melted or your dough will be too sticky to work with properly
• Cane sugar: The coarse crystals help create those pretty slightly crisp edges we all love
• Lemon zest: Use a microplane if you have one, it releases way more aromatic oils than a regular grater
• Fine sea salt: Don't skip this, it balances all that bright lemon sweetness
• Baking powder and baking soda: This combo gives just enough lift without making cookies spread too thin
• Plant-based milk: Unsweetened works best, I usually grab oat or almond milk from the fridge
• Fresh lemon juice: Room temperature juice incorporates more evenly into the dough
• Pure vanilla extract: Rounds out all that citrus and adds a lovely warmth
• Fresh lemon juice: For the curd, use really fresh lemons, the bottled stuff just doesn't have the same brightness
• More lemon zest: This is where all that lemon punch comes from, don't be shy with it
• Cornstarch: The magic thickener that turns this into proper curd instead of soup
• Full fat coconut milk: Shake that can really well before opening, the cream and liquid separate
• Turmeric: Just the tiniest pinch gives you that gorgeous yellow curd color without any weird taste
• Vegan butter: Makes the curd feel luxurious and helps it set up properly

Get your oven ready:

Preheat to 350°F and line two baking sheets with parchment paper, this saves so much cleanup later and prevents sticking

Mix the dry ingredients:

Whisk together both flours, sugar, lemon zest, salt, baking powder, and baking soda until everything is evenly distributed

Cut in the coconut oil:

Use a pastry cutter or fork to work the solid coconut oil into the flour mixture until it looks like coarse crumbs with some pea-sized pieces remaining

Combine the wet ingredients:

Whisk the plant-based milk, lemon juice, and vanilla in a small measuring cup, then pour into your flour mixture

Form the dough:

Stir gently until everything comes together into a soft dough, it should hold together when you squeeze it but not be sticky

Shape the cookies:

Roll 24 balls about 1 tablespoon each, place on your prepared sheets and flatten to 1/4 inch thick with the palm of your hand

Bake to perfection:

Slide into the oven for 10 to 12 minutes until edges just start turning golden, they'll firm up as they cool so don't overbake

Make the lemon curd:

While cookies cool, whisk lemon juice, zest, sugar, cornstarch, coconut milk and turmeric in a saucepan over medium heat

Cook until thickened:

Keep whisking constantly for 4 to 6 minutes until the mixture bubbles and thickens nicely, don't walk away or it might scorch

Finish the curd:

Remove from heat and stir in vegan butter and salt until completely smooth, transfer to a bowl and let cool completely

Assemble the sandwiches:

Spoon about 1 tablespoon of cooled curd onto the flat side of half your cookies, top with remaining cookies and gently press together

Chill briefly:

Pop assembled cookies in the fridge for 10 to 15 minutes to help the curd set up, though they're delicious immediately too

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My sister texted me at midnight the first time I made these, absolutely refusing to believe they were vegan. She ate three sandwich cookies while standing at my counter, just staring at them like they were some kind of magic trick. Now she makes them for her kids' school events and nobody suspects they're allergy-friendly.

I learned the hard way that whisking constantly is non-negotiable when making this curd. The one time I stepped away to check my phone, the cornstarch clumped up and I had to start over with fresh ingredients. Now I put on music and treat it like a mini arm workout.

These cookies walk such a fine line between underbaked and perfect. I used to pull them out too early and they'd be soft and sad, but then I figured out that slightly golden edges are the sweet spot. They still stay tender in the middle but get that nice subtle crunch on the outside.

The curd actually develops even more lemon flavor if you make it a day ahead and keep it in the fridge. I love having everything ready to assemble for unexpected guests.

• Unfilled cookies freeze beautifully for up to a month
• Assembled sandwiches are best within 3 to 4 days in the fridge
• Let chilled sandwiches sit at room temperature for 10 minutes before serving for the best texture

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There's something so satisfying about biting into these bright little sandwiches, especially when the weather starts warming up. They're the kind of treat that makes everyone pause and ask for seconds.

Recipe FAQs

→ How long do these keep fresh?

Store in an airtight container in the refrigerator for up to 4 days. The filling will stay firm and the cookies remain crisp.

→ Can I make these nut-free?

Yes, simply replace the almond flour with an equal amount of gluten-free all-purpose flour blend for nut-free treats.

→ Can I freeze the assembled cookies?

Freeze assembled cookies in a single layer, then transfer to a freezer-safe container. Thaw in the refrigerator for 2 hours before serving.

→ What can I use instead of coconut milk?

Full-fat canned coconut milk provides the best texture, but you can substitute with cashew cream or other thick plant-based milk alternatives.

→ How do I know when the curd is thick enough?

The curd is ready when it coats the back of a spoon and bubbles appear while whisking. It will continue to thicken as it cools.

→ Can I make the cookies ahead of time?

Bake cookies up to 2 days in advance and store at room temperature. Fill with curd shortly before serving for best texture.