This Gluten-Free Rhubarb Almond Cake Recipe is one of those desserts that just feels like a warm hug on a plate. The tender almond flour crumb paired with the tangy bursts of rhubarb makes it uniquely satisfying — and it’s naturally gluten-free, so everyone can enjoy a slice (or two!). I absolutely love how the lemon zest brightens the flavors, making this cake perfect for spring afternoons or casual get-togethers.
Why You’ll Love This Recipe
- Naturally Gluten-Free: Thanks to almond and specialty flours, it’s perfect for gluten-sensitive guests without sacrificing flavor or texture.
- Fresh Rhubarb Tang: The tartness of rhubarb contrasts beautifully with the rich almond base.
- Simple Yet Impressive: You don’t need fancy techniques — just straightforward steps for a stunning result.
- Versatile and Adaptable: Easy to tweak with your favorite fruits or dietary preferences.
Ingredients You’ll Need
Every ingredient in this Gluten-Free Rhubarb Almond Cake Recipe has a job that helps bring out a balanced, moist, and flavorful cake. From the variety of flours to the fresh rhubarb and creamy yogurt, these components blend just right — and I’ll share some tips on grabbing the best of each.
- Rhubarb: Use firm, fresh stalks. The natural tartness shines here, and slicing it diagonally adds a nice texture.
- Almond Flour: Blanched almond flour gives a buttery nuttiness and moist crumb that makes this cake extra special.
- Sweet White Rice Flour: Adds lightness without gluten, balancing the denser almond flour.
- GF Oat Flour: I recommend oat flour here for subtle sweetness — but sorghum flour is a fine swap if you prefer.
- Millet Flour: Adds a little crunch and a mild savory note, rounding out the flavor.
- Olive Oil: Extra-virgin quality adds richness and helps keep the cake moist.
- Greek Yogurt: Brings moisture and tang; plant-based alternatives work well too if you need dairy-free.
- Lemon Zest and Juice: Vital for fresh brightness — don’t skip this or the cake won’t shine as much.
- Eggs: Essential for structure and lift, helping the cake hold its shape and fluff up.
- Granulated Sugar: A little sweetness lets the rhubarb’s tartness pop without overwhelming it.
- Baking Powder and Soda: Work together to give the perfect rise and tender crumb.
- Butter or Ghee for the Pan: Keeps the cake from sticking while adding a touch of flavor.
- Sliced Almonds: For topping, adding crunch and an inviting look.
Variations
I love trying little twists on my Gluten-Free Rhubarb Almond Cake Recipe depending on the season or who I’m baking for. Feel free to experiment with these ideas — it’s your cake, after all!
- Grain-Free Version: I swapped the sweet rice, oat, and millet flours for cassava and tapioca flour once, and it kept the texture wonderfully moist without grain flours.
- Dairy-Free Adaptation: Using rich coconut yogurt instead of Greek yogurt gave the cake a subtle tropical note that my family adored.
- Refined Sugar-Free: Replacing sugar with maple syrup or coconut sugar is a great natural sweetener alternative, just adjust the liquids accordingly.
- Fruit Swaps: No rhubarb? No worries! I’ve made this cake with fresh berries, plums, and even ripe pears — each delivers a unique twist but just as delicious.
How to Make Gluten-Free Rhubarb Almond Cake Recipe
Step 1: Prep the Oven and Pan
Start by positioning your oven rack in the center and preheating to 350ºF — the even heat is key for baking this cake perfectly. Next, generously butter your 10-inch tart pan (or a 9-inch cake or springform pan) using room temperature butter, ghee, or coconut oil. I like placing the pan on a rimmed baking sheet to catch any drips — it saves cleanup headaches later.
Step 2: Prepare the Rhubarb
Trim the rhubarb stalks, slicing them diagonally into 1-inch pieces for a nice bite. Then, dice about ¾ cup of those less attractive pieces. Toss the sliced rhubarb with 3 tablespoons of sugar and a squeeze of lemon juice, and the diced bits in a separate bowl with 1 tablespoon sugar and lemon juice. Setting them aside for up to 30 minutes helps soften the rhubarb and draws out extra flavor. Fun tip: save the juice to add to sparkling water — it’s a refreshing little treat!
Step 3: Mix Wet Ingredients with Zest
In a large bowl, rub lemon zest into ½ cup of the sugar until it’s moist and clumpy — this wakes up the lemon’s oils. Then whisk in two eggs, Greek yogurt, and olive oil until everything is fully combined. The lemon-sugar step really makes a difference; when I missed that once, something just felt “off” in the cake’s brightness.
Step 4: Combine Dry Ingredients
Using a fine strainer, sift together almond flour, sweet white rice flour, oat flour, millet flour, baking powder, baking soda, and salt. Sifting helps ensure even distribution of leavening agents and prevents lumps — which is especially important for gluten-free baking where texture can be tricky. Then stir these into your wet mixture gently until the batter is smooth and homogeneous.
Step 5: Fold in Rhubarb and Prepare for Baking
Drain the diced rhubarb from its sugar-lemon juice and fold it into the batter. Pour the batter into your prepared pan, smoothing it evenly with a spatula. Then artistically arrange the sliced rhubarb on top in concentric circles or just scatter them randomly for a rustic look — I actually prefer the playful, uneven style. Sprinkle the remaining sugar and sliced almonds on top; this crisp topping makes the cake extra appealing once baked.
Step 6: Bake and Cool
Bake the cake for about 40 to 50 minutes until it’s golden on top and a toothpick inserted near the center comes out clean. Oven times vary, so start checking around 40 minutes to avoid overbaking. Once out, let the cake cool completely (about 45 minutes) before removing the pan sides. It’s tempting to dive in early, but patience pays off here — this resting time helps the cake set perfectly and develop flavor.
Pro Tips for Making Gluten-Free Rhubarb Almond Cake Recipe
- Hand Zesting the Lemon: I like using a microplane to zest directly into the sugar — it releases those lovely oils more fully.
- Separate Rhubarb Tossing: Tossing sliced and diced rhubarb separately with sugar and lemon helps keep the cake’s texture interesting.
- Use a Rimmed Baking Sheet: Placing your cake pan on a sheet catches any drip from the rhubarb juices so your oven stays clean.
- Don’t Skip Cooling Time: Letting the cake cool fully ensures clean slices and perfect texture, avoiding crumble or sogginess.
How to Serve Gluten-Free Rhubarb Almond Cake Recipe
Garnishes
I adore serving this cake with a dollop of lightly whipped crème fraîche — it adds a creamy, tangy contrast that complements the almond flavor beautifully. Fresh mint leaves or a dusting of powdered sugar also make it feel special without overpowering those lovely rhubarb notes.
Side Dishes
Keep it simple with a hot cup of Earl Grey or chamomile tea for a cozy afternoon treat. If you want something more festive, a scoop of vanilla bean ice cream elevates this cake to dinner-party worthy dessert status.
Creative Ways to Present
For birthdays or gatherings, I like layering slices with fresh berries and whipped yogurt in a trifle dish—it’s a beautiful way to showcase the vibrant rhubarb and almond flavors. You can also pack slices in pretty boxes for thoughtful homemade gifts that always get rave reviews.
Make Ahead and Storage
Storing Leftovers
I store leftover cake covered at room temperature for a day, which keeps it soft and fresh. After that, I transfer it to the fridge wrapped tightly to prevent drying out, and it stays delicious for up to 3 days.
Freezing
This cake freezes well! I slice it into wedges, wrap each piece tightly in plastic wrap, then place them in an airtight container. When I’m ready to enjoy, I just thaw slices overnight in the fridge — handy for unexpected guests or quick snacks.
Reheating
I gently warm leftover slices in a low oven or toaster oven for 5–7 minutes. This refreshes the almond aroma and softens the texture without making it dry. Just avoid microwaving, which tends to toughen gluten-free cakes.
FAQs
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Can I use frozen rhubarb for this cake?
Yes, you can use frozen rhubarb, but make sure to thaw and drain it thoroughly to remove excess moisture. This helps prevent the batter from becoming too wet and ensures the cake bakes properly without being soggy.
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Is this recipe suitable for those with nut allergies?
This Gluten-Free Rhubarb Almond Cake Recipe relies heavily on almond flour for its texture and flavor, so it’s not suitable for nut allergies. However, you could experiment with replacing almond flour with a seed flour blend, but that would change the texture and flavor quite a bit.
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Can I substitute the Greek yogurt with a non-dairy alternative?
Absolutely. I’ve had great results using thick coconut or plant-based yogurts in place of Greek yogurt. Just make sure your substitute is unsweetened and similar in consistency to maintain the cake’s moisture and tang.
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How do I know when the cake is done?
Bake until the top is golden and a toothpick or skewer inserted near the center comes out clean or with just a few crumbs attached. Around 40-50 minutes should do it, but start checking closer to 40 minutes to avoid overbaking.
Final Thoughts
I can’t recommend this Gluten-Free Rhubarb Almond Cake Recipe enough — it’s become my go-to when I want something that feels both cozy and a little fancy. The textures and flavors just sing together, and it’s super approachable whether you’re new to gluten-free baking or an old pro. Next time you have fresh rhubarb on hand, give this a try — I promise it’ll make your kitchen smell amazing and your loved ones ask for seconds!
Print
Gluten-Free Rhubarb Almond Cake Recipe
- Prep Time: 20 minutes
- Cook Time: 50 minutes
- Total Time: 1 hour 10 minutes
- Yield: 10 servings 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Gluten Free
Description
This Gluten-Free Rhubarb Cake with Almond Flour is a moist, tender cake bursting with tangy rhubarb flavor, enhanced by a blend of almond and gluten-free flours. Perfect for spring and summer, it’s topped with sliced rhubarb and crunchy almonds for a delightful texture contrast. It makes a beautiful dessert or snack served with whipped crème fraîche.
Ingredients
For the Pan
- 1 teaspoon room-temperature butter, ghee, or coconut oil for the pan
Wet Ingredients
- 12 ounces rhubarb (3–4 large stalks), divided use
- 1 scant cup organic granulated sugar, divided use
- Finely grated zest from 1 medium lemon, plus a squeeze of lemon juice
- 2 large eggs
- ⅓ cup whole-milk plain Greek yogurt (or plant yogurt)
- ¼ cup + 2 tablespoons (90 ml) extra-virgin olive oil
Dry Ingredients
- 1 ¼ cups (120 g) blanched almond flour
- ½ cup (80 g) sweet white rice flour
- ½ cup (55 g) gluten-free oat flour (or 55 g sorghum flour)
- ¼ cup (35 g) millet flour
- 2 teaspoons (8 g) baking powder
- ½ teaspoon baking soda
- ½ teaspoon fine sea salt
For Decoration and Serving
- Handful sliced almonds, for decorating
- Whipped crème fraîche, for serving
Instructions
- Prepare the Oven and Pan: Position a rack in the center of the oven and preheat to 350ºF. Rub a 10-inch round solid tart pan, or 9-inch cake pan or springform pan, with the butter and place it on a rimmed baking sheet to catch any drips.
- Prepare the Rhubarb: Trim any leafy bits from the rhubarb stalks. Slice the stalks diagonally into 1-inch thick pieces and dice less attractive pieces until you have ¾ cup diced rhubarb. Toss the sliced rhubarb with 3 tablespoons of sugar and a squeeze of lemon juice. In a separate bowl, toss the diced rhubarb with 1 tablespoon sugar and a squeeze of lemon juice. Set aside for up to 30 minutes.
- Make the Batter – Lemon and Wet Ingredients: In a large bowl, rub the lemon zest into ½ cup of sugar until moistened and clumpy. Whisk in the eggs, Greek yogurt, and olive oil until combined.
- Make the Batter – Dry Ingredients: Place a strainer over the bowl (or another bowl if needed) and sift in almond flour, sweet rice flour, oat flour, millet flour, baking powder, baking soda, and sea salt. Add any bits caught in the sifter back in.
- Combine Batter: Stir the sifted flour mixture into the wet ingredients until smooth and homogenous. Drain the diced rhubarb and fold it gently into the batter.
- Assemble the Cake: Scrape the batter into the prepared pan and smooth into an even layer. Arrange the sliced rhubarb pieces on top in concentric circles or scatter them randomly as desired. Leave any rhubarb juice behind to use as a refreshing drink.
- Add Toppings: Sprinkle the cake with the remaining 2 tablespoons (20 g) sugar and a handful of sliced almonds evenly over the top.
- Bake: Bake in the preheated oven until golden on top and a tester inserted near the center comes out clean, about 50 minutes.
- Cool and Serve: Remove the cake from the oven and let it cool completely for about 45 minutes. Remove the sides from the pan and slide the cake onto a serving platter. Cut into wedges and serve with whipped crème fraîche.
- Storage: The cake is best eaten within the first 2 days. Store covered at room temperature for the first day, then refrigerate to keep it fresh longer.
Notes
- Grain-Free Option: Omit the sweet rice, oat, and millet flours. Use ½ cup + 2 tablespoons (95 g) cassava flour and ¼ cup (30 g) tapioca flour instead.
- Dairy-Free Option: Substitute Greek yogurt with dairy-free sour cream or plant-based yogurt such as coconut yogurt.
- Refined Sugar-Free Option: Replace granulated sugar with 1 cup of maple syrup or coconut sugar and use a neutral oil instead of olive oil to maintain flavor balance.
- Fruit Substitution: If rhubarb is unavailable, try berries, cherries, plums, stone fruits, ripe pears, or figs as alternatives.
