Name: Flourless Orange Pistachio Cake
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Cuisine: Mediterranean
Ingredients: For the Cake; 2 cups shelled pistachios, finely ground (240 g); 3/4 cup granulated sugar (150 g); 3 large eggs (150 g); 1/2 cup unsalted butter, melted (113 g); 1 tbsp orange zest (6 g); 1/4 cup fresh orange juice (60 ml); 1 tsp vanilla extract (5 ml); 1 tsp baking powder (4 g); 1/4 tsp salt (1.5 g); For the Orange Syrup; 1/4 cup fresh orange juice (60 ml); 2 tbsp honey (42 g); 1 tsp orange zest (2 g); For the Garnish; 1/4 cup shelled pistachios, roughly chopped (30 g); 1 tbsp orange zest (2 g); Powdered sugar, for dusting (optional)

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Flourless Orange Pistachio Cake is a beautifully moist, naturally rich cake made with finely ground pistachios, fresh orange juice, orange zest, and melted butter. The pistachios give the cake a tender texture and deep nutty flavour, while fresh orange brings a bright citrus note to every bite.

A simple honey-orange syrup is brushed over the warm cake, helping to keep it moist and adding an extra layer of fresh citrus sweetness. Finished with chopped pistachios, orange zest, and an optional dusting of powdered sugar, this elegant cake is perfect for afternoon tea, dessert, or a special gathering.

Ingredients

For the Cake:

2 cups shelled pistachios, finely ground (240 g)
¾ cup granulated sugar (150 g)
3 large eggs (150 g)
½ cup unsalted butter, melted (113 g)
1 tbsp orange zest (6 g)
¼ cup fresh orange juice (60 ml)
1 tsp vanilla extract (5 ml)
1 tsp baking powder (4 g)
¼ tsp salt (1.5 g)

For the Orange Syrup:

¼ cup fresh orange juice (60 ml)
2 tbsp honey (42 g)
1 tsp orange zest (2 g)

For the Garnish:

¼ cup shelled pistachios, roughly chopped (30 g)
1 tbsp orange zest (2 g)
Powdered sugar, for dusting (optional)

How to Make It

1. Prepare the Oven and Cake Pan

Preheat the oven to 350°F (175°C). Grease a 9-inch (23 cm) round cake pan and line the bottom with parchment paper. This helps the cake release easily after baking.

2. Combine the Dry Ingredients

Place the finely ground pistachios, granulated sugar, baking powder, and salt in a large mixing bowl. Whisk until everything is evenly distributed.

3. Mix the Wet Ingredients

In a separate bowl, whisk the eggs until lightly frothy. Add the melted butter, orange zest, fresh orange juice, and vanilla extract. Whisk until the mixture is smooth and evenly combined.

4. Make the Batter

Gradually add the pistachio mixture to the wet ingredients, stirring gently until a thick, evenly combined batter forms. Avoid overmixing, as gentle mixing helps maintain the cake’s tender texture.

5. Bake the Cake

Pour the batter into the prepared cake pan and smooth the surface. Bake for 35–40 minutes, or until the centre is set and a toothpick inserted into the middle comes out with a few moist crumbs.

6. Cool the Cake

Allow the cake to cool in the pan for 10–15 minutes. Carefully transfer it to a wire rack and let it cool further before adding the syrup.

7. Prepare the Orange Syrup

While the cake cools, combine the fresh orange juice, honey, and orange zest in a small saucepan. Simmer over low heat for 3–4 minutes, stirring occasionally, until the mixture is slightly reduced and glossy.

8. Add the Orange Syrup

While the cake is still slightly warm, brush or drizzle the orange syrup evenly over the surface. Allow the syrup to soak into the cake, adding moisture and fresh orange flavour.

9. Garnish and Serve

Finish the cake with roughly chopped pistachios, fresh orange zest, and a light dusting of powdered sugar if desired. Let the cake cool completely, then slice and serve.

Why This Recipe Works

Finely ground pistachios take the place of traditional flour, giving this cake its distinctive nutty flavour and naturally moist, tender crumb. The combination of melted butter and eggs creates a rich texture, while baking powder provides enough lift to keep the cake light rather than dense.

Fresh orange juice and zest bring brightness to the rich pistachio base, while the simple honey-orange syrup adds moisture and an extra layer of citrus flavour. The chopped pistachio garnish also adds a pleasant contrast in texture.

Tips for the Best Flourless Orange Pistachio Cake

Grind the pistachios finely: A fine pistachio texture helps create a more even and tender cake.
Use fresh oranges: Freshly grated zest and juice give the cake a brighter citrus flavour.
Do not overmix: Stir the batter just until the ingredients are evenly combined.
Watch the baking time: The cake is ready when the centre is set and a toothpick comes out with a few moist crumbs.
Apply the syrup while warm: A slightly warm cake absorbs the orange syrup more easily.
Cool before slicing: Allowing the cake to cool completely helps it set and makes cleaner slices.

Serving Suggestions

Serve slices of the orange pistachio cake on their own with a generous sprinkle of chopped pistachios and fresh orange zest. The optional powdered sugar adds a simple finishing touch without overpowering the pistachio and citrus flavours.

For a more indulgent dessert, serve the cake alongside a spoonful of softly whipped cream or another light accompaniment. It also makes a lovely afternoon treat with tea or coffee.

Frequently Asked Questions

Can I use store-bought ground pistachios?

Yes. Finely ground pistachios can be used as long as they have a fine, even texture. Avoid pistachios that have been ground into a paste, as this can change the consistency of the batter.

How do I know when the cake is done?

The centre should be set and a toothpick inserted into the middle should come out with a few moist crumbs. Avoid waiting until the toothpick is completely dry, as the cake is best when it remains moist.

Can I make the cake ahead of time?

Yes. The cake can be prepared ahead and allowed to cool completely before serving. Keeping it covered helps maintain its moist texture.

When should I add the orange syrup?

Brush or drizzle the syrup over the cake while it is still slightly warm. This allows the cake to absorb the syrup more easily.

Can I skip the powdered sugar?

Absolutely. Powdered sugar is optional. The cake is already finished with chopped pistachios and fresh orange zest, which provide plenty of flavour and a simple presentation.

What type of pan should I use?

A 9-inch (23 cm) round cake pan works well for this recipe. Lining the base with parchment paper makes it easier to remove the cake after baking.

Nutrition & Timing

Details	Amount
Servings	10
Prep Time	15 minutes
Cook Time	40 minutes
Total Time	55 minutes
Calories	365
Protein	10 g
Carbohydrates	25 g
Fat	26 g
Fiber	4 g
Sugar	19 g
Sodium	150 mg

Final Thoughts

This flourless orange pistachio cake brings together rich pistachios, fragrant orange zest, fresh citrus juice, and a light honey-orange syrup for an elegant dessert with a wonderfully moist texture. It is simple enough for an afternoon treat while still feeling special enough for entertaining.

With its naturally nutty flavour, bright citrus finish, and colourful pistachio garnish, this cake is a beautiful addition to any dessert table. Serve it fully cooled for the best texture and finish each slice with a little extra orange zest or chopped pistachios.