Name: Gluten-Free Rhubarb Cake with Almond Flour Recipe
Prep time: 20 min
Cook time: 45 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 1 teaspoon room-temperature butter, ghee, or coconut oil for the pan; 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; 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; Handful sliced almonds, for decorating; Whipped crème fraîche, for serving

Jump to Recipe· 3.8 from 51 reviews

There is something truly magical about a perfectly moist and tender cake that celebrates spring’s tartest gem—rhubarb. This Gluten-Free Rhubarb Cake with Almond Flour Recipe combines the natural tang of rhubarb with nutty almond flour and a blend of gluten-free flours to create a cake that is light, flavorful, and simply bursting with freshness. Whether you’re naturally gluten-free or just craving a beautiful, rustic dessert that’s not overly sweet, this cake will quickly become a cherished favorite to bake and share with loved ones. Let me take you through everything you need to bring this wonderful treat to your table!

Ingredients You’ll Need

A white bowl filled with a smooth, light brown creamy mixture, spread evenly inside. On the right side of the bowl, there are many small, bright red diced pieces sitting on top of the creamy base. A white spatula with a wooden handle rests inside the bowl, its blade touching the creamy mixture near the red diced pieces. The bowl sits on a soft pink cloth napkin, placed over a white marbled surface. Photo taken with an iphone --ar 4:5 --v 7

Everything in this Gluten-Free Rhubarb Cake with Almond Flour Recipe is thoughtfully chosen to enhance texture, flavor, and color without any fuss. These simple ingredients ensure your cake is moist but sturdy, tangy but just sweet enough, and naturally gluten-free without sacrificing taste.

Butter, ghee, or coconut oil for the pan: Just a touch to keep your cake from sticking and add richness to the crust.
Rhubarb stalks (12 ounces): The star ingredient providing a lovely tart punch and juiciness throughout the cake.
Organic granulated sugar (1 scant cup, divided): Offers balanced sweetness, with some tossed on top for a delightful crunch.
Lemon zest and juice: Adds bright citrus notes that lift the rhubarb’s flavor beautifully.
Large eggs (2): Binding agents that add structure and richness without weighing down the cake.
Whole-milk plain Greek yogurt (⅓ cup): Contributes tenderness and moisture, with a subtle tang.
Extra-virgin olive oil (¼ cup + 2 tablespoons): Keeps the crumb soft and adds a mild fruity undertone.
Blanched almond flour (1 ¼ cups): The gluten-free base that imparts a wonderful nutty flavor and crumbly texture.
Sweet white rice flour (½ cup): Ensures the cake stays light and cakey without grit.
Gluten-free oat flour (½ cup): Or sorghum flour for gentle earthiness and enhanced crumb.
Millet flour (¼ cup): A lesser-known gluten-free flour that adds moisture and subtle sweetness.
Baking powder and baking soda: Leavening agents that guarantee your cake rises nicely and stays fluffy.
Fine sea salt (½ teaspoon): Enhances all flavors and balances the sweetness.
Sliced almonds: Crisp topping that provides texture contrast and nutty aroma.
Whipped crème fraîche: Perfect for serving alongside to add a creamy finish.

How to Make Gluten-Free Rhubarb Cake with Almond Flour Recipe

Step 1: Prepare Your Oven and Pan

Start by positioning a rack right in the center of your oven and preheating it to 350ºF. Using a 10-inch round solid tart pan, or if you prefer, a 9-inch cake or springform pan, rub the inside with a teaspoon of butter, ghee, or coconut oil to prevent sticking. Then, place the pan on a rimmed baking sheet to catch any drips during baking. This hands-on setup ensures even cooking and a flawless bake.

Step 2: Prepare the Rhubarb

Trim off any leafy bits from your rhubarb stalks, then slice them diagonally into 1-inch thick pieces. You’ll want to dice some of the less visually appealing pieces to get about ¾ cup of diced rhubarb for the cake batter. Toss the sliced rhubarb separately with 3 tablespoons of sugar and a squeeze of lemon juice, and do the same for the diced rhubarb in another bowl but with 1 tablespoon of sugar. Set these aside to macerate for up to 30 minutes, allowing the sugar and lemon to draw out that enticing rhubarb juice and soften the tartness, making the flavors more vibrant.

Step 3: Make the Cake Batter

In a large mixing bowl, rub the lemon zest into ½ cup of sugar until it becomes moist and clumpy—this step intensifies the lemon aroma and flavor. Whisk in the eggs, Greek yogurt, and olive oil until well combined. Now, it’s time to sift the dry ingredients: almond flour, sweet rice flour, oat flour, millet flour, baking powder, baking soda, and salt. Using a sieve ensures your batter stays light and without lumps. Carefully fold the dry mixture into the wet ingredients until smooth. Drain the diced rhubarb and fold it gently into the batter; the rhubarb juices add a subtle fizz-like sensation, making the crumb wonderfully moist.

Step 4: Assemble and Bake

Pour your batter into the prepared pan, spreading it evenly. Now the fun part—arranging the sliced rhubarb on top. You can be as neat or as whimsical as you like; laying them in concentric circles is elegant, but scattering them randomly gives a charming, rustic look. Don’t forget to sprinkle the top with the remaining 2 tablespoons of sugar and the sliced almonds for that irresistible crunchy crown. Bake the cake for 40 to 50 minutes until the top is golden and a toothpick inserted near the center comes out clean. Let the cake cool completely in the pan before gently removing the sides. The anticipation will be worth the wait!

How to Serve Gluten-Free Rhubarb Cake with Almond Flour Recipe

A round tart with a golden-brown baked crust and filling, topped with deep pink rhubarb pieces arranged in a radiating pattern from the center outward; between the pink rhubarb are textured light golden, slightly grainy almond filling segments, with thin toasted almond slices scattered on top near the edges; the tart sits inside a white scalloped ceramic dish resting on a metal wire rack over a white marbled surface, and a woman’s hands hold the dish with a soft pink cloth under it; a few almond slices and a dusting of flour are scattered around the tart photo taken with an iphone --ar 4:5 --v 7

Garnishes

This cake shines best when paired with a dollop of lightly whipped crème fraîche—it’s creamy but not too heavy, providing just the right cooling counterpoint to rhubarb’s natural tang. A sprinkle of extra sliced almonds or a few fresh lemon zest curls can add a fresh and elegant touch just before serving.

Side Dishes

If you’re offering the cake at a brunch or afternoon tea, consider fresh fruit like strawberries or a berry compote on the side. The fruity notes complement the rhubarb charm beautifully without adding too much sweetness. A mild herbal tea or sparkling water with a splash of rhubarb juice from the batter preparation also pairs delightfully.

Creative Ways to Present

For a delightful twist, serve individual slices with a scoop of vanilla bean ice cream or a drizzle of honey for an added layer of indulgence. You can also cut the cake into small squares and serve them on colorful plates with edible flowers for a charming, festive presentation that will wow guests.

Make Ahead and Storage

Storing Leftovers

This Gluten-Free Rhubarb Cake with Almond Flour Recipe stays moist and delicious for days. Keep leftovers covered at room temperature on the first day, then transfer to the fridge to maintain freshness. It’s great for enjoying as a snack or dessert over a couple of days.

Freezing

If you want to enjoy this cake later, wrap it tightly with plastic wrap and place it in an airtight container before freezing. It freezes well for up to two months. When you’re ready, thaw it overnight in the fridge to preserve texture and flavor.

Reheating

For a freshly baked taste, warm individual slices gently in a microwave for 15-20 seconds or in a preheated oven at 300ºF for about 10 minutes. This will refresh the cake’s softness and revive its wonderful aroma, perfect for cozy afternoons.

FAQs

Can I substitute the almond flour for another type of flour?

Almond flour adds a lovely nuttiness and moist texture key to this recipe, but if you have a nut allergy, you can try sunflower seed flour or pumpkin seed flour. Just note that the flavor and texture might vary slightly.

Is it necessary to use all four gluten-free flours listed?

Each flour in this recipe balances moisture, texture, and crumb, so combining them gives the best result. However, if you don’t have millet or oat flour, you can replace them with extra sweet rice flour or sorghum flour, but try to keep the same total flour weight.

Can I make this cake dairy-free?

Absolutely! Simply swap the Greek yogurt for a plain plant-based yogurt and make sure the butter, ghee, or oil used for the pan is dairy-free. The olive oil already brings a wonderful moistness, so it adapts well to dairy-free needs.

How ripe should the rhubarb be for baking?

Fresh, firm rhubarb stalks are best—avoid any that look wilted or overly fibrous. The tart crunch makes the cake vibrant and perfectly balanced with the sweetness of the sugar and cake batter.

Can I double this recipe for a larger cake?

You can, but be mindful of the pan size and baking time. Using a larger pan or two pans will ensure even baking; start checking for doneness around 45 minutes and adjust as needed.

Final Thoughts

This Gluten-Free Rhubarb Cake with Almond Flour Recipe is a fantastic way to celebrate seasonal rhubarb and enjoy a dessert that’s as beautiful as it is delicious. It’s light, moist, and bursting with bright flavors—a perfect companion for your next gathering or a cozy afternoon treat. I truly hope you’ll give it a try and discover how effortlessly this cake can become one of your treasured recipes!