Whole Orange Almond Cake (Gluten-Free)

This cake uses an entire orange, peel and all, for a deep, aromatic citrus flavor that feels far more complex than the ingredient list lets on. Almond flour keeps it impossibly moist and gives it a tender crumb without a trace of wheat flour.

It happens to be naturally gluten-free and dairy-free, which means it works for all kinds of eaters without any fussy substitutions. The hardest part is waiting for it to cool before you cut a slice.

Why This Cake Just Works

The whole boiled orange is what sets it apart. Instead of relying on zest and juice alone, you blend the entire fruit into a fragrant, bittersweet purée that carries every drop of oil from the peel. That purée turns the almond flour base into something rich, soft, and almost custardy at the center.

Because almond flour is naturally high in fat, the cake stays moist for days. No butter or oil needed, and no dry, crumbly edges by the third day.

The flavor is somewhere between marmalade and marzipan, bright but rounded, with a delicate nuttiness that comes through in every bite. A scatter of toasted almonds on top adds a light crunch that breaks up the tender crumb.

Ingredients

• 1 large navel orange (about 10 oz), scrubbed clean: the whole orange gets boiled and puréed, peel included; choose a thin-skinned one for less bitterness
• 3 large eggs, at room temperature: helps the batter emulsify smoothly
• 3/4 cup (150g) granulated sugar: regular white sugar works best for an even crumb
• 2 cups (200g) blanched almond flour: not almond meal; the fine, blanched kind gives the softest texture
• 1 teaspoon baking powder: lifts the batter just enough without making it spongy
• 1/4 teaspoon fine sea salt: balances the sweetness and brightens the orange
• 1 teaspoon pure vanilla extract: rounds out the almond and citrus
• 2 tablespoons sliced almonds (optional): to scatter over the top before baking for a toasty, crisp surface

Swaps and Variations

• Less bitter orange flavor: trim away some of the white pith after boiling, or use a sweet thin-skinned orange like a cara cara.
• Swap the citrus: a whole meyer lemon or a couple of clementines works the same way; reduce the sugar by a tablespoon for sweeter fruit.
• Nut-free: swap the almond flour for an equal weight of fine ground sunflower seed flour, and skip the almond topping.
• Sugar alternatives: you can use an erythritol-based sweetener designed for baking, though the cake will be slightly less moist and will dry out faster.
• Warm spice: add 1/2 teaspoon ground cardamom or a pinch of cinnamon along with the dry ingredients.

Fluffy Gluten-Free Vanilla Cake is another dessert you’d probably love if you enjoy this cake.

How to Make Orange Almond Cake

Step 1: Boil and Purée the Orange

Place the whole orange in a medium saucepan and cover it with cold water by at least an inch. Bring the water to a boil over high heat, then reduce the heat to a steady simmer and cook for 1 hour. The orange will soften all the way through and the kitchen will smell like warm orange syrup.

Drain the orange and let it sit until it is cool enough to handle. Cut it into quarters, flick out any visible seeds, then transfer the entire fruit, skin and all, to a food processor. Pulse until the purée is smooth and glossy, scraping down the sides once or twice. You should have about 3/4 cup of thick, fragrant orange paste.

Step 2: Whisk the Wet Ingredients

Preheat your oven to 350°F (175°C). Lightly oil an 8-inch or 9-inch round cake pan and line the bottom with a circle of parchment paper so the cake releases cleanly later.

In a large bowl, whisk the 3 eggs and the 3/4 cup sugar together vigorously for about 90 seconds. The mixture will turn pale and thicken a little, falling off the whisk in ribbons. Pour in the orange purée and the 1 teaspoon vanilla and whisk again until the batter is smooth and evenly tinted pale orange.

Step 3: Fold in the Dry Ingredients

Add the 2 cups almond flour, 1 teaspoon baking powder, and 1/4 teaspoon salt to the bowl. Switch to a flexible spatula and fold the dry ingredients into the wet mixture, scraping from the bottom and turning the batter over itself. Keep going until no streaks of dry flour remain and the batter looks uniform. It will be thick and slightly grainy, not pourable like a boxed cake mix.

Scrape the batter into the prepared pan and spread it evenly to the edges. If you are using the sliced almonds, scatter them across the top in an even layer.

Step 4: Bake the Cake

Set the pan on the center rack of the hot oven and bake for 45 to 50 minutes (a 9-inch pan) or 50 to 55 minutes (an 8-inch pan). The top will turn deep golden brown and a toothpick pushed into the center should come out with only a few moist crumbs clinging to it.

Rotate the pan once about halfway through the bake if your oven runs uneven. The cake will puff slightly and the almond topping will look toasted and shiny. Remove it from the oven and let it rest in the pan on a wire rack for 10 minutes.

Step 5: Cool and Slice

Run a thin knife around the edge of the cake, then invert it onto a plate and carefully turn it right-side up onto a cooling rack. Peel off the parchment. Let the cake cool completely, at least an hour, before you cut into it. Warm cake will crumble when sliced and the orange flavor is not as pronounced yet.

When it has fully cooled, slice it into wedges right on the rack or transfer it to a serving plate. The crumb will be tender and golden, with a delicate crackly top where the almonds caught the heat.

Tips for the Best Texture

• Start with a soft orange: by simmering it the full hour. A firm orange will not purée as smoothly and can leave chewy bits of peel in the cake.
• Blanch your own almond flour: if you have whole raw almonds on hand. A quick dunk in boiling water removes the skins, and grinding the dried nuts in a food processor gives a slightly coarser but still delicious result.
• Do not overbake.: Almond flour cakes go from moist to dry quickly near the end. Start checking 5 minutes before the shortest recommended time.
• Toast the sliced almonds: in a dry skillet for a minute before sprinkling them on the batter. It deepens their flavor and adds a noticeable crunch.

Bake times by pan:

Keeping It Fresh

Wrap the cooled cake tightly in plastic and leave it at room temperature for up to 3 days. In warm weather, store it in the refrigerator for up to 5 days, but let it sit out for 20 minutes before serving so the crumb softens back up. This cake also freezes well for up to a month, double-wrapped.

What To Serve With Orange Almond Cake

A spoonful of thick Greek yogurt or labneh alongside a slice cuts the sweetness just right and adds a cool, tangy contrast. Whipped cream with a little orange blossom water echoes the citrus notes without competing. Fresh berries, especially raspberries, bring a bright pop of acidity that wakes up the rich almond flavor.

Frequently Asked Questions

Can I use almond meal instead of almond flour?

Yes, but the cake will be heavier and coarser. Almond meal includes the skins, which absorb less moisture and can give a grainier bite.

How far ahead can I boil the orange?

You can boil, purée, and refrigerate the orange up to 3 days in advance. Bring the purée to room temperature before mixing it into the batter.

Can I freeze the whole cake?

Yes. Wrap the fully cooled cake in plastic, then foil, and freeze for up to a month. Thaw it overnight in the fridge and bring it to room temperature before slicing.

My cake sank in the middle, what went wrong?

The most common cause is underbaking. Almond flour cakes set more slowly, so a toothpick check is key. Opening the oven door too early can also cause a collapse.

Orange Almond Cake Recipe

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 50 minutes mins

Total Time 1 hour hr 5 minutes mins

Servings: 8 servings

Calories: 270

Ingredients Method Notes

Ingredients

  

• 1 large navel orange (about 10 oz), scrubbed clean
• 3 large eggs, at room temperature
• 3/4 cup (150g) granulated sugar
• 2 cups (200g) blanched almond flour
• 1 teaspoon baking powder
• 1/4 teaspoon fine sea salt
• 1 teaspoon pure vanilla extract
• 2 tablespoons sliced almonds (optional)

Method

 

1. Simmer the whole orange in water for 1 hour until soft. Drain, cool, cut into quarters, remove seeds, and purée the entire fruit in a food processor until smooth.
2. Preheat oven to 350°F (175°C). Oil a round cake pan and line the bottom with parchment. Whisk eggs and sugar until pale and thick, then whisk in the orange purée and vanilla.
3. Fold in almond flour, baking powder, and salt with a spatula until no dry spots remain. The batter will be thick.
4. Spread batter into the pan, top with sliced almonds if using, and bake 45–55 minutes (see pan guide) until deeply golden and a toothpick comes out with just a few crumbs.
5. Cool in the pan 10 minutes, then turn out onto a rack, peel off parchment, and cool completely before slicing.

Notes

This cake tastes even better the next day as the orange and almond flavors settle. Be sure the orange is cooled enough to handle before you purée it so the mixture does not cook the eggs later.