
This flourless pistachio cake with chocolate ganache delivers a luxurious dessert experience without the need for flour. The vibrant green pistachios create a moist, nutty base while the silky chocolate ganache adds decadent richness that makes this cake perfect for special occasions or whenever you crave something truly exceptional.
I first made this cake for my sister's birthday when she was diagnosed with gluten sensitivity. The look on her face when she realized she could enjoy the entire dessert without worry made this recipe an instant family treasure.
Ingredients
- Pistachios: Use unsalted raw pistachios for the purest flavor and vibrant green color
- Powdered sugar: Creates a more delicate texture than granulated sugar would
- Large eggs: Provide structure and lift in place of traditional flour
- Vanilla extract: Choose pure extract not imitation for the best flavor profile
- Baking powder: Even though this is flourless a small amount helps achieve the perfect rise
- Salt: Enhances all the flavors especially the nuttiness of pistachios
- Dark chocolate chips: Select 60 percent or higher cocoa content for a rich not overly sweet ganache
- Heavy cream: Creates the silky base for your ganache use full fat for best results
- Unsalted butter: Adds glossiness and prevents the ganache from setting too firmly
Step-by-Step Instructions
- Pistachio Preparation:
- Preheat your oven to 350°F and prepare your pan meticulously. The key is grinding the pistachios to a fine meal texture but stopping before they turn into butter. Pulse in short bursts watching carefully until they resemble coarse sand.
- Mixing the Batter:
- Combine your dry ingredients first before adding eggs one at a time. This ensures proper incorporation without overmixing. The batter will be thicker than traditional cake batter with a beautiful pale green hue.
- Baking:
- Watch the cake carefully as nut flours burn more easily than wheat flour. The edges should pull away slightly from the pan and the center should spring back when gently touched. Overbaking will result in dryness so err on the side of caution.
- Making the Ganache:
- Heat the cream until bubbles form around the edges but do not let it boil. Pour it over the chocolate and let sit for 30 seconds before stirring. This temperature difference is crucial for a smooth shiny ganache without separation.
- Assembling:
- Place the completely cooled cake on a wire rack over a baking sheet to catch drips. Pour ganache from the center allowing it to naturally flow outward. Tap the rack gently to help the ganache settle into an even layer.

The pistachios are truly the star of this recipe. I discovered the importance of quality nuts after once using stale pistachios that completely ruined the vibrant flavor. Now I always store extra pistachios in the freezer to ensure I have fresh ones on hand whenever the craving for this cake strikes.
Storage Tips
This cake maintains its moisture beautifully for up to five days when stored properly. Keep it in an airtight container at room temperature for two days or refrigerate for longer storage. Let refrigerated slices come to room temperature before serving to fully appreciate the texture and flavor complexity. If you need to store it longer you can freeze individual slices wrapped tightly in plastic wrap then foil for up to three months.

Serving Suggestions
While this cake is exquisite on its own consider elevating it with thoughtful accompaniments. A dollop of lightly whipped cream infused with a touch of rosewater creates a Middle Eastern inspired pairing that highlights the pistachios. For contrast serve with fresh raspberries or a raspberry coulis which cuts through the richness with bright acidity. During summer months a scoop of homemade vanilla bean ice cream alongside creates a temperature contrast that heightens the sensory experience.
Flavor Variations
The basic recipe provides an excellent canvas for creative adaptations. For a Middle Eastern twist add 1 teaspoon of cardamom to the batter and garnish with crushed dried rose petals. Citrus lovers can incorporate 1 tablespoon of orange zest in the batter and a tablespoon of Grand Marnier in the ganache. For coffee enthusiasts dissolve 1 tablespoon of espresso powder in the vanilla extract before adding to the batter and the result will be a mocha pistachio creation that satisfies multiple cravings at once.
Frequently Asked Questions
- → What makes this cake flourless?
This cake uses ground pistachios instead of traditional flour, giving it a naturally gluten-free base.
- → Can I use other nuts instead of pistachios?
Yes, you can substitute pistachios with almonds or hazelnuts for a similar texture and taste, though the flavor will vary slightly.
- → How do I ensure the ganache is smooth?
Heat the cream until just simmering, then pour it over the chocolate chips and butter. Stir slowly and thoroughly to avoid lumps.
- → Can I make this cake ahead of time?
Absolutely. The cake can be stored in the refrigerator for up to 3 days. Add the ganache just before serving for the best texture.
- → How should I store leftovers?
Store leftover cake in an airtight container in the refrigerator for up to 3-4 days. Serve at room temperature or slightly chilled.