This Rhubarb Crumble Cake is soft, buttery, and layered with ribbons of jammy rhubarb compote and crunchy orange streusel. Finished with a soft dollop of magnolia whipped cream, it has the perfect balance of flavors and textures.
If you’ve been looking for an easy rhubarb cake that feels bakery-worthy without being fussy, this one delivers. I’ll walk you through exactly how to get a tender crumb, balanced flavor, and those beautiful layers of streusel and rhubarb throughout the loaf, plus plenty of tips and substitutions along the way.
Recipe highlights
- Tart rhubarb + warm cardamom + bright orange zest + floral magnolia
- Soft, moist, tender crumb with ribbons of rhubarb throughout
- Crunchy orange streusel layered inside and on top
- The perfect balance of tart and sweet
- Easy to customize with different spices, fruits, or toppings
Recipe overview
⏱️ Prep: ~35 mins • Bake: 55-70 mins • Total: ~1 hr 45 mins
🍴 Yield: 1 loaf cake (8-10 slices)
💪 Skill level: Beginner
😋 Flavor profile: Tart rhubarb, warm spices, buttery orange streusel, lightly floral magnolia cream. Pairs well with: Tea, coffee, vanilla bean, strawberries, creme fraiche, citrus.
What makes this rhubarb crumble cake special
Unlike many rhubarb cake recipes that simply fold chopped rhubarb into batter, this loaf uses a quick rhubarb compote layered throughout the cake. The result is thin layers of soft, jammy rhubarb woven into every slice.
The orange zest streusel also gets layered throughout the cake instead of sitting only on top, which gives every bite a little buttery crunch and a pop of flavor. A little spice from cardamom, ginger, and magnolia flower petals adds more depth and a little warmth to the overall flavor profile. Serve each slice with a dollop of the optional magnolia whipped cream for the perfect finish.
👉 The magnolia whipped cream is completely optional, but it’s such a fun finishing touch if you already have magnolia syrup and/or powder on hand and have been wanting to use them. The floral, slightly spicy flavor pairs beautifully with the tart rhubarb and fresh orange in this recipe. Find tutorials here: magnolia syrup + how to dry & powder the petals.
How to make rhubarb crumble cake
Find the full ingredients list and detailed recipe instructions in the recipe card at the bottom of this post. Here’s a quick step-by-step overview of how to make this recipe:
- Make the rhubarb compote. Simmer chopped rhubarb with brown sugar and orange juice until soft and jammy. Let cool before layering into the batter.
- Prepare the streusel. Mix flour, sugar, orange zest, butter, and salt together until crumbly.
- Mix the cake batter. Cream together butter, sugar, and salt until light and fluffy, then add eggs and vanilla. Alternate dry ingredients with sour cream + orange juice.
- Layer the cake. Add some batter to the loaf pan, followed by rhubarb compote and streusel. Repeat the layers once more, then finish with remaining cake batter and streusel on top. Set aside extra rhubarb compote for serving.
- Bake. Bake until the streusel is golden and a digital thermometer inserted into the center reads 180° F.
- Cool completely. Let the cake cool before slicing so the layers can fully set.
- Make the magnolia cream, if using. Whip heavy cream with magnolia syrup and magnolia powder until soft peaks form.
- Serve and enjoy! Spoon magnolia cream over slices just before serving.
🌸 If you’d like to serve this cake with the magnolia whipped cream, you’ll need some homemade magnolia syrup to sweeten and flavor the cream. For even more floral flavor, you can also add a little dried, ground magnolia petal powder, but if you don’t have any on hand, a pinch of ground ginger & cardamom makes a lovely substitute.
Pro tips for the best rhubarb cake
Let the rhubarb compote cool completely before layering it in the cake. The compote will set and thicken more as it cools, helping to create strong visual ribbons through the cake.
Use room temperature butter & eggs for the softest, most even crumb.
Avoid overmixing the batter once the flour is added to keep the cake tender.
Keep the rhubarb compote away from the sides of the pan to avoid burning.
Line your loaf pan with parchment for easier removal.
Tent the loaf with foil if needed during the last part of baking if the streusel gets too dark.
Let the cake cool fully before slicing to give everything a chance to set.
Serve with the extra rhubarb compote on top – it’s delicious!
How to get that tender texture
One of my favorite things about this rhubarb crumble cake is how soft and tender the crumb stays for days. A combination of almond flour, sour cream, and fresh orange juice keeps the loaf incredibly moist and delicate without feeling heavy. The almond flour softens the texture of the cake, while the sour cream adds richness and the orange juice brightens everything up with a little extra moisture and flavor.
Variations & substitutions
This rhubarb crumble cake is easy to customize depending on your preferences.
For the compote: Try swapping out half of the rhubarb for chopped strawberries or raspberries.
For the spices: I use powdered magnolia petals and cardamom for this cake, but you can substitute any warm spices you like. Think cinnamon, ginger, nutmeg, or even vanilla bean.
For the almond flour: If you don’t have almond flour on hand, you can substitute another soft non-gluten flour like oat flour, brown rice flour, or even a good-quality gluten free baking blend. The texture may vary slightly, but the goal is simply to soften the crumb and add a little extra tenderness to the cake.
For the citrus: Feel free to substitute lemon in place of the orange zest & juice.
For the magnolia cream: If you don’t have access to magnolia flowers, this cake is delicious all on its own, or you can also top it with:
- Ginger or vanilla whipped cream
- Crème fraîche whipped cream
- Vanilla ice cream
- Whipped mascarpone
- Vanilla sauce
To make a whipped cream with a similar flavor to this magnolia cream, sweeten the heavy cream with 2 tablespoons of sugar in place of the magnolia syrup and replace the magnolia powder with ground ginger.
Storage & serving
Store leftover rhubarb crumble cake tightly covered at room temperature for up to 4 days. The streusel will soften slightly over time, but the flavor becomes even better the next day.
Store the magnolia whipped cream and any leftover rhubarb compote separately in the refrigerator, tightly wrapped.
This cake is especially delicious:
- Slightly warm with coffee
- Served for brunch
- As an afternoon tea cake
- Topped with extra rhubarb compote
- With fresh strawberries on the side
If you make this Rhubarb Crumble Cake, I’d love to hear what you think. Leave a comment and star rating below. Thank you!
Rhubarb Crumble Cake
Equipment
- 9×5 inch loaf pan
- Stand mixer + paddle or electric beaters
Ingredients
Rhubarb compote:
- 10 ounces (~3 cups) fresh rhubarb, chopped
- ½ cup brown sugar
- juice of 1/2 orange, about ¼ cup
Streusel:
- ½ cup sugar
- ¼ teaspoon salt
- ¾ cup all purpose flour
- zest of 1 orange
- 2 ounces (¼ cup) unsalted butter, cold, diced
Cake:
- 8 ounces (1 cup) unsalted butter, soft, room temperature
- ¾ cup sugar
- 1 teaspoon salt
- 2 eggs
- 1 teaspoon vanilla
- 2 cups all purpose flour
- ¼ cup almond flour
- 2 teaspoons baking powder
- ½ teaspoon baking soda
- 1 teaspoon grounder ginger powder, or magnolia powder
- ½ teaspoon ground cardamom
- 1 cup sour cream or full fat plain Greek yogurt
- juice of 1/2 orange, about ¼ cup
Magnolia whipped cream (optional):
- ¾ cup heavy cream
- 1 tablespoon magnolia syrup, or sub 2 Tbsp sugar
- ½ teaspoon powdered magnolia petals, or sub ground ginger
Instructions
For the compote:
- Prep: First, zest the orange and put the zest aside for use in the streusel. Wash the 10 oz of rhubarb and chop into rough pieces. Juice the orange.
- Make the compote: Cook chopped rhubarb, ½ cup brown sugar, and half of the fresh orange juice in a large saucepan over medium heat. Simmer mixture, stirring frequently, until rhubarb completely breaks down, about 10 minutes.Pour into a bowl and set aside to cool completely.
For the streusel:
- Mix: In a medium bowl, stir together ½ cup sugar, ¼ tsp salt, ¾ cup flour, and the orange zest you set aside. Add 2 oz cold diced butter and blend it in using your fingers or a pastry blender until the mixture is moistened and crumbly with small pieces of butter remaining.
For the cake:
- Prep: Generously butter a 9×5 inch loaf pan and line the bottom and 2 sides with parchment paper. Preheat oven to 350° F.
- Cream the butter & sugar: In a large mixing bowl, cream together the 8 oz softened butter, ¾ cup sugar, and 1 tsp salt until light, pale, and fluffy, about 2-3 minutes. Scrape down the sides of the bowl as needed. Add the eggs one at a time, mixing well after each addition, then mix in the 1 tsp vanilla extract.
- Mix dry ingredients: In a separate bowl, whisk together the 2 cups flour, ¼ cup almond flour, 2 tsp baking powder, ½ tsp baking soda, 1 tsp ginger and ½ tsp cardamom.
- Alternate wet & dry: Add ½ of the dry ingredients to the butter mixture and blend in lightly. Then, mix in 1 cup sour cream + the remaining orange juice, blending until almost combined. Add the rest of the dry ingredients, mixing just until combined. Be careful not to overmix.
- Layer: Spread about ⅓ of the cake batter into the prepared loaf pan. Spoon about ⅓ cup of the rhubarb compote over the batter in small dollops, avoiding touching the sides of the pan (exposed rhubarb can burn if touching the pan). Then lightly sprinkle a few tablespoons of the streusel mixture over top.Add another ⅓ of the batter and gently spread it out as best you can (it's thick!), followed by another layer of rhubarb compote and another light sprinkling of streusel. Finish with the remaining batter, smoothing the top gently, then sprinkle all remaining streusel evenly over the top of the loaf.Note: There will be extra rhubarb compote – save this for serving!
- Bake: Bake the cake until the streusel is golden and a digital thermometer inserted into the center reads 180° F. Move to a cooling rack and allow the cake to cool completely.
For the magnolia cream:
- Whip: Use electric beaters or a stand mixer with the whisk attachment to whip ¾ cup heavy cream with 1 Tbsp magnolia syrup and ½ tsp magnolia powder until soft peaks form.Serve slices of cake with a dollop of whipped cream and extra rhubarb compote.
Notes
Did you try this recipe?
Be sure to leave a comment below!
