Flourless orange cake

Why You’ll Love This Recipe

I love this flourless orange cake because the orange flavor runs through the entire cake rather than appearing only in a glaze or frosting. By cooking and blending whole oranges, I use the flesh and peel, which gives the cake a wonderfully concentrated citrus character.

Ground almonds create a rich, moist texture and subtle nuttiness that pairs naturally with orange. I also appreciate that I don’t need traditional flour to create a satisfying cake.

Another reason I make this recipe is that it tastes even better after resting. I can prepare it a day ahead and let the citrus and almond flavors develop overnight.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

For the Flourless Orange Cake

• Whole oranges
• Large eggs
• Granulated sugar
• Almond flour or finely ground almonds
• Baking powder
• Vanilla extract
• Fine salt

For Serving

• Powdered sugar, optional
• Fresh orange slices, optional
• Orange zest, optional
• Crème fraîche or Greek yogurt, optional
• Sliced or toasted almonds, optional

Directions

1. Cook the Oranges

I place the whole oranges in a saucepan and cover them generously with water. I bring the water to a boil, reduce it to a gentle simmer, and cook the oranges for about 1½–2 hours, or until completely tender.

I drain the oranges and let them cool enough to handle. I cut them open, remove any seeds, and keep the peel, flesh, and juice.

2. Purée the Oranges

I place the cooked oranges in a food processor or blender and process them until I have a relatively smooth purée.

I let the purée cool completely before adding it to my cake batter.

3. Prepare the Pan

I preheat my oven to 350°F (175°C). I grease an 8- or 9-inch springform or round cake pan and line the bottom with parchment paper.

I also lightly grease the parchment and sides to make releasing the moist cake easier.

4. Beat the Eggs and Sugar

I beat the eggs and granulated sugar together until the mixture becomes pale, slightly thickened, and airy.

I add the vanilla and cooled orange purée and gently mix until evenly incorporated.

5. Add the Almonds

I combine the almond flour, baking powder, and salt before folding them into the orange mixture.

I mix only until everything is evenly combined. The batter will look wetter than a conventional flour-based cake batter, which I expect.

6. Bake

I pour the batter into my prepared pan and smooth the surface.

I bake the cake for approximately 50–60 minutes, or until the top is golden brown and a skewer inserted into the center comes out mostly clean.

If the surface starts becoming too dark before the center is ready, I loosely cover the cake with foil for the remainder of the baking time.

7. Cool

I leave the cake in its pan for about 20 minutes before carefully releasing the sides.

Because this cake is particularly moist and delicate while warm, I let it cool completely before transferring and slicing it.

8. Decorate and Serve

Once completely cool, I dust the cake lightly with powdered sugar. I can also scatter toasted sliced almonds over the surface or decorate it with fresh orange slices and zest.

I particularly like serving each slice with a spoonful of crème fraîche or thick Greek yogurt because the tangy creaminess balances the sweet orange flavor.

Servings and Timing

I usually cut this flourless orange cake into 8 to 10 slices.

• Prep time: 20 minutes
• Orange cooking time: 1½–2 hours
• Baking time: 50–60 minutes
• Cooling time: about 1 hour
• Total time: approximately 3½–4 hours
• Servings: 8–10

I can cook and purée the oranges in advance and refrigerate the purée until I’m ready to make the cake.

Variations

For a chocolate-orange version, I add unsweetened cocoa powder or finely chopped dark chocolate to the batter. I love how the slight bitterness of chocolate complements the whole-orange flavor.

For extra almond character, I add a small amount of almond extract and scatter sliced almonds over the top before baking.

When I want a warmly spiced cake, I add cinnamon, cardamom, or ground ginger. I find all three work particularly well with orange and almonds.

For a syrup-soaked variation, I make a simple syrup with fresh orange juice and sugar and spoon a small amount over the warm cake.

I can also use mandarins or clementines instead of regular oranges. I adjust the quantity depending on their size so I end up with a similar amount of cooked citrus purée.

Storage/Reheating

I store my flourless orange cake covered at room temperature for up to 2 days. For longer storage, I refrigerate it in an airtight container for up to 5 days.

I actually find the cake particularly good on the second day because the orange flavor develops and the crumb remains wonderfully moist.

I usually serve it at room temperature rather than reheating it. If I’ve refrigerated the cake, I take individual slices out about 20–30 minutes before serving.

For longer storage, I freeze individual slices for up to 2 months. I wrap them tightly and thaw them overnight in the refrigerator or for a few hours at room temperature.

FAQs

Is flourless orange cake gluten-free?

When I make the cake without wheat flour and use ingredients that are specifically confirmed gluten-free, it can be suitable for a gluten-free diet. I particularly check the baking powder and ground almonds for labeling or cross-contact concerns when this matters.

Why do I boil whole oranges for this cake?

I cook the oranges until their peel becomes very soft so I can blend the whole fruit into a smooth purée. Cooking also helps mellow some of the peel’s bitterness while retaining the concentrated citrus flavor I want in the finished cake.

Can I make flourless orange cake without almond flour?

Ground almonds provide much of the structure, moisture, and texture in this particular cake, so I don’t replace them directly with ordinary flour. If I need to avoid almonds, I prefer using a recipe specifically developed around a different flour or ground nut.

Why is my flourless orange cake so moist in the middle?

I expect this cake to have a much moister, denser crumb than a traditional sponge. If the center is genuinely wet or unset, I bake it a little longer. I also let the cake cool completely before slicing because it firms considerably as it cools.

Can I make this cake ahead of time?

Yes. I often make it one day before serving because the texture stays moist and the orange flavor becomes even more pronounced after resting. I keep it well covered and add any powdered sugar or fresh garnishes shortly before serving.

Conclusion

Flourless orange cake is one of my favorite ways to showcase the full flavor of fresh oranges. Using whole cooked fruit gives me an intensely fragrant cake with a pleasant bittersweet edge, while ground almonds create a rich and exceptionally moist crumb.

Flourless orange cake

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An exceptionally moist flourless orange cake made with whole cooked oranges and ground almonds for intense citrus flavor and a tender, slightly dense crumb. Its subtle nuttiness and gentle bittersweet orange character make it an elegant naturally gluten-free dessert when prepared with certified gluten-free ingredients.

• Author: Laura
• Prep Time: 20 minutes
• Cook Time: 2 hours 30 minutes–3 hours
• Total Time: Approximately 3½–4 hours
• Yield: 8–10 slices
• Category: Dessert
• Method: Baking
• Cuisine: Mediterranean-Inspired
• Diet: Gluten Free

Ingredients

• Whole oranges
• Large eggs
• Granulated sugar
• Almond flour or finely ground almonds
• Baking powder
• Vanilla extract
• Fine salt
• Powdered sugar, optional for serving
• Fresh orange slices, optional for serving
• Orange zest, optional for serving
• Crème fraîche or Greek yogurt, optional for serving
• Sliced or toasted almonds, optional for serving

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Instructions

1. Place the whole oranges in a saucepan and cover generously with water. Bring to a boil, reduce to a gentle simmer, and cook for 1½ to 2 hours, or until the oranges are completely tender.
2. Drain the oranges and let them cool enough to handle. Cut them open, remove any seeds, and retain the peel, flesh, and juice.
3. Transfer the cooked oranges to a food processor or blender and process until relatively smooth. Allow the orange purée to cool completely.
4. Preheat the oven to 350°F (175°C). Grease an 8-inch or 9-inch springform or round cake pan and line the bottom with parchment paper. Lightly grease the parchment and sides.
5. Beat the eggs and granulated sugar until pale, slightly thickened, and airy. Add the vanilla extract and cooled orange purée and gently mix until evenly incorporated.
6. Combine the almond flour, baking powder, and salt in a separate bowl. Fold the dry ingredients into the orange mixture just until evenly combined.
7. Pour the batter into the prepared pan and smooth the surface. Bake for 50 to 60 minutes, until the top is golden brown and a skewer inserted into the center comes out mostly clean. If the surface browns too quickly, loosely cover it with foil for the remainder of the baking time.
8. Let the cake cool in the pan for about 20 minutes before carefully releasing the sides. Allow it to cool completely before transferring or slicing.
9. Dust the cooled cake with optional powdered sugar and decorate with toasted sliced almonds, fresh orange slices, or orange zest. Serve at room temperature with optional crème fraîche or thick Greek yogurt.

Notes

• Cooking the whole oranges softens the peel and mellows its bitterness while preserving concentrated citrus flavor.
• The cooked orange purée can be prepared in advance and refrigerated until needed.
• This cake naturally has a moist, slightly dense crumb and firms considerably as it cools.
• For a gluten-free diet, confirm that ingredients such as baking powder and ground almonds are specifically labeled gluten-free and suitable for your needs.
• For a chocolate-orange variation, add unsweetened cocoa powder or finely chopped dark chocolate to the batter.
• For extra almond flavor, add a small amount of almond extract and top the cake with sliced almonds before baking.
• Cinnamon, cardamom, or ground ginger can be added for a warmly spiced variation.
• Mandarins or clementines can replace the oranges when adjusted to provide a similar quantity of cooked citrus purée.
• Store covered at room temperature for up to 2 days or refrigerate in an airtight container for up to 5 days.
• Individual slices can be wrapped tightly and frozen for up to 2 months.

Nutrition

• Serving Size: 1 slice
• Calories: 340 kcal
• Sugar: 28 g
• Sodium: 150 mg
• Fat: 19 g
• Saturated Fat: 2 g
• Unsaturated Fat: 16 g
• Trans Fat: 0 g
• Carbohydrates: 36 g
• Fiber: 4 g
• Protein: 10 g
• Cholesterol: 95 mg