Pistachio and Blackberry Olive Oil Cake was not something any of us had ever made before the afternoon Lucia came home from the market with a jar of blackberry preserves in one hand and a bag of shelled pistachios in the other, looking very pleased with herself. Maria raised an eyebrow. Teresa put down her coffee. And Lucia simply set both things on the kitchen counter beside the good bottle of olive oil we keep near the stove and said nothing more. She did not need to.
Within the hour the food processor was running, the kitchen smelled extraordinary, and all three of us were hovering around the oven waiting for something we already knew was going to be remarkable.
Pistachio and Blackberry Olive Oil Cake is one of those cakes that makes people who have never thought to combine these flavors together suddenly wonder why they have been baking any other way. Olive oil in place of butter gives the crumb a tenderness and moisture that lasts for days. Ground pistachios folded through the batter add a subtle nuttiness and a gorgeous pale green color that is completely unique on a dessert table.
And the salted blackberry and thyme buttercream, rich and fruity with the most unexpected and beautiful whisper of dried thyme running through it, is something you will want to put on everything forever. Come follow us on Pinterest where we share beautiful and unique recipes like this one from our kitchen every single week.
Table of Contents
Why You Will Love This Pistachio and Blackberry Olive Oil Cake Recipe
This Pistachio and Blackberry Olive Oil Cake recipe is dairy-free in the cake layers themselves which makes it a genuinely inclusive dessert that more people at your table can enjoy without any compromise on flavor or texture. The olive oil keeps the crumb extraordinarily moist and gives the finished cake a subtle fruity depth that butter simply cannot replicate. The homemade buttermilk made by combining milk with a tablespoon of apple cider vinegar tenderizes the crumb beautifully and adds a gentle tang that balances the sweetness of the blackberry preserves throughout the layers.
The salted blackberry and thyme buttercream is the element that truly sets this cake apart from every other pistachio cake you have ever tasted. The dried thyme is subtle, barely there, but it lifts the blackberry flavor in a way that makes every single bite taste sophisticated and genuinely memorable. It is a combination that sounds unexpected and tastes absolutely extraordinary. Our Lemon Pasta makes the most elegant and unfussy main course before this kind of show-stopping and uniquely flavored dessert centerpiece.
Ingredients Needed for This Pistachio and Blackberry Olive Oil Cake Recipe
For the Pistachio Olive Oil Cake:
- 110g (⅘ cup) Shelled Pistachios
- 220g (1 cup) Granulated Sugar
- 260g (2 cups) All-Purpose Flour
- 10g (2½ tsp) Baking Powder
- 3g (½ tsp) Salt
- 290ml (1⅕ cups) Milk of Choice
- 15g (1 tbsp) Apple Cider Vinegar or Lemon Juice
- 120ml (½ cup) Good Quality Olive Oil
- 12g (1 tbsp) Pure Vanilla Extract
- 4g (1 tsp) Almond Extract
- All-Natural Green Food Dye (optional)
- Blackberry Preserves for filling
For the Salted Blackberry and Thyme Buttercream:
- 339g (1½ cups) Salted Butter, room temperature
- 105g (⅓ cup) Blackberry Preserves
- 360g (3 cups) Powdered Sugar
- 6g (1½ tsp) Pure Vanilla Extract
- 6g (1 tsp) Salt
- 1g (½ tsp) Dried Thyme
For Garnish:
- Fresh Blackberries
- Roughly Chopped Pistachios
How to Make This Pistachio and Blackberry Olive Oil Cake Recipe
Preheat your oven to 350°F. Grease two 6-inch or 7-inch round cake pans thoroughly with butter, dust with flour, and line the bases with circles of parchment paper. Set aside. Begin by making your homemade buttermilk. Whisk together the milk and apple cider vinegar or lemon juice in a measuring cup and allow it to sit for 5 minutes. It will curdle slightly and thicken and that is exactly what you want. This simple step gives the cake crumb its tenderness and a beautiful subtle tang.
While the buttermilk rests, add the shelled pistachios and granulated sugar to a food processor and pulse together until finely ground but still retaining just a little texture. You want the pistachios to be powdery and fine with a few slightly larger pieces remaining for interest. In a medium bowl, whisk together the ground pistachio and sugar mixture with the flour, baking powder, and salt until evenly combined. In a separate large bowl, whisk together the prepared buttermilk, olive oil, vanilla extract, and almond extract until fully blended. If you want to enhance the natural green color of the pistachios, add a few drops of all-natural green food dye to the wet mixture now and stir it through.
Gently fold the dry ingredients into the wet ingredients using a wide spatula with slow careful strokes until just combined and no streaks of flour remain. Stop the moment the batter looks smooth, cara mia. Overmixing is the one thing that will make this cake dense rather than the light and tender beauty it is meant to be.
Divide the batter evenly between the two prepared pans, approximately 425 grams per pan. Bake for 25 to 30 minutes until the tops are set and golden and a toothpick inserted into the center comes out completely clean. Cool completely in the pans on a wire rack, then wrap tightly in plastic wrap and refrigerate overnight. This overnight chill is genuinely worth the planning ahead. It firms the layers for cleaner assembly, deepens the pistachio flavor beautifully, and gives you a cake that is far easier to frost without tearing.
When you are ready to assemble, make the buttercream. Beat the room temperature salted butter and blackberry preserves together in a stand mixer until completely smooth and the preserves are fully incorporated. Add the powdered sugar gradually on low speed until fully combined. Add the vanilla, salt, and dried thyme, then increase the speed to medium and beat for 4 to 5 full minutes until the buttercream is light, fluffy, and a gorgeous deep purple-pink. Level one cake layer with a serrated knife if needed and place it cut side up on your cake stand.
Spread a generous layer of buttercream and spoon blackberry preserves into the center. Place the second layer on top and frost the outside with the remaining buttercream. Spoon a little more blackberry preserves over the top and scatter fresh blackberries and roughly chopped pistachios over the surface for a garnish that is completely stunning.
How to Serve This Pistachio and Blackberry Olive Oil Cake Recipe
Allow the assembled cake to sit at room temperature for at least 30 minutes before slicing and serving. Cold buttercream straight from the refrigerator is too firm and the full flavor of the olive oil in the cake needs a few minutes of warmth to open up properly. Serve each slice on a white ceramic plate with a small scatter of fresh blackberries alongside and a drizzle of good honey over the top for an optional touch of golden sweetness that is absolutely beautiful against the deep purple buttercream. Our Margherita Pizza makes a wonderful simple and unfussy Italian-inspired main course before this sophisticated and stunning dessert.
How to Store This Pistachio and Blackberry Olive Oil Cake Recipe
Store the assembled cake covered loosely in the refrigerator for up to 4 days. The olive oil in the cake actually helps it stay moist and tender longer than a butter-based cake would so it is genuinely as delicious on day three as it was on day one. Allow slices to come to room temperature for 20 to 30 minutes before serving for the best texture and flavor. To freeze the unassembled cake layers, wrap each one tightly in plastic wrap and then aluminum foil and freeze for up to 2 months. Make the buttercream fresh when you are ready to assemble and serve.
Tips to Make This Pistachio and Blackberry Olive Oil Cake Recipe
Use the best quality olive oil you have access to for the cake batter. Extra virgin olive oil gives the most flavor and the most beautiful fruity depth to the finished cake. A mild or light olive oil will still work but you will lose some of the character that makes this cake so unique. When grinding the pistachios with the sugar, stop before they become a paste. You want a fine sandy texture with a few slightly larger pieces remaining. Over-processing will release the natural oils in the pistachios and the mixture will clump together. Pulse in short bursts and check frequently.
Helpful Notes for This Pistachio and Blackberry Olive Oil Cake Recipe
The dried thyme in the buttercream is the ingredient that surprises everyone and it is the one we most strongly urge you not to skip. Half a teaspoon sounds like almost nothing and it is almost nothing but that tiny amount adds an herbal dimension to the blackberry buttercream that makes it taste genuinely sophisticated and unlike any frosting you have made before. It does not taste like a herb. It tastes like the blackberry flavor has been turned up to its fullest most complex expression. If you truly cannot find dried thyme, a tiny pinch of dried lavender works beautifully as an alternative.
Variation of This Pistachio and Blackberry Olive Oil Cake Recipe
Maria made a version with raspberry preserves instead of blackberry one spring afternoon and the pale pink buttercream with the green pistachio cake layers was one of the most visually stunning combinations we have ever assembled on a cake stand in our kitchen. Teresa tried adding a tablespoon of orange zest to the pistachio cake batter for a citrus variation and the combination of orange, pistachio, and blackberry in every bite was something we are still talking about months later.
For a summer variation, fold a handful of fresh blackberries directly into the batter before baking for pockets of jammy berry throughout the crumb that taste absolutely wonderful. Our Vegan Lemon Blueberry Cupcakes bring a beautiful bright berry energy that creates a stunning and cohesive spread alongside this cake on any celebration dessert table.
FAQs About This Pistachio and Blackberry Olive Oil Cake Recipe
Can I use a different oil if I do not have olive oil?
Olive oil is central to the character of this cake and we strongly recommend using it, specifically a good quality extra virgin olive oil, for the most authentic flavor and the most tender moist crumb. Vegetable oil or avocado oil will work as substitutes and will give you a moist cake but without the fruity depth and sophistication that the olive oil contributes.
Why do I need to chill the cake layers overnight before assembling?
The overnight chill firms the layers significantly which makes them much easier to level, stack, and frost without tearing or crumbling. It also allows the pistachio and olive oil flavors to deepen and develop overnight in a way that genuinely improves the finished taste of the cake. If you are short on time, a minimum of 2 hours in the refrigerator will help but overnight gives the best results.
Can I make this cake ahead of time for a party?
Absolutely and it is actually ideal for making ahead. The assembled and frosted cake can be refrigerated for up to 4 days and the flavor only improves over the first two days. Simply remove it from the refrigerator 30 minutes before serving to allow the buttercream to soften and the olive oil cake layers to come to their most delicious room temperature texture.
Conclusion
This Pistachio and Blackberry Olive Oil Cake is one of the most sophisticated and genuinely unique cakes we have ever made in our kitchen and it has earned a permanent place at our celebration table alongside all the beloved classics. It is the cake you make when you want to serve something truly special, something that makes people pause, take a bite, close their eyes, and say nothing for a moment because nothing needs to be said. We hope it brings that same wonderful silence to your table. Make it, share it, and come back to tell us everything. With all our love, Maria, Lucia, and Teresa
Print
Pistachio and Blackberry Olive Oil Cake The Most Stunning and Unique Cake You Will Bake
- Total Time: 50 minutes plus overnight chilling
- Yield: 12 slices 1x
- Diet: Vegetarian
Description
A moist and tender Pistachio and Blackberry Olive Oil Cake with ground pistachios and fruity olive oil in the batter, blackberry preserves filling, and a salted blackberry and thyme buttercream. Sophisticated, stunning, and completely unforgettable.
Ingredients
110g Shelled Pistachios
220g Granulated Sugar
260g All-Purpose Flour
10g Baking Powder
3g Salt
290ml Milk of Choice
15g Apple Cider Vinegar or Lemon Juice
120ml Good Quality Olive Oil
12g Pure Vanilla Extract
4g Almond Extract
All-Natural Green Food Dye optional
Blackberry Preserves for filling
339g Salted Butter room temperature for buttercream
105g Blackberry Preserves for buttercream
360g Powdered Sugar
6g Pure Vanilla Extract for buttercream
6g Salt for buttercream
1g Dried Thyme
Fresh Blackberries for garnish
Roughly Chopped Pistachios for garnish
Instructions
1. Preheat oven to 350°F. Grease two 6 or 7 inch cake pans, dust with flour, and line bases with parchment.
2. Whisk milk and apple cider vinegar together and rest 5 minutes to make homemade buttermilk.
3. Pulse pistachios and sugar in a food processor until finely ground with a little texture remaining.
4. Whisk pistachio sugar mixture with flour, baking powder, and salt in a medium bowl.
5. Whisk buttermilk, olive oil, vanilla, and almond extract together in a large bowl. Add green food dye if using.
6. Fold dry ingredients into wet ingredients until just combined. Do not overmix.
7. Divide batter evenly between prepared pans and bake 25 to 30 minutes until a toothpick comes out clean.
8. Cool completely then wrap and refrigerate overnight.
9. Beat salted butter and blackberry preserves until smooth.
10. Add powdered sugar gradually on low speed until combined.
11. Add vanilla, salt, and dried thyme then beat on medium 4 to 5 minutes until light and fluffy.
12. Level one cake layer if needed and place cut side up on cake stand.
13. Spread buttercream and spoon blackberry preserves in the center.
14. Place second layer on top and frost with remaining buttercream.
15. Garnish with fresh blackberries and chopped pistachios. Rest 30 minutes at room temperature before serving.
Notes
Use good quality extra virgin olive oil for the best flavor and moistness.
Do not over-process pistachios or they will turn to paste.
Overnight chilling of cake layers is highly recommended for easiest assembly and best flavor.
Dried thyme in the buttercream is subtle but essential for depth of flavor.
Cake keeps well in the refrigerator for up to 4 days and improves in flavor over the first two days.
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 slice
- Calories: 380
- Sugar: 32g
- Sodium: 210mg
- Fat: 24g
- Saturated Fat: 11g
- Unsaturated Fat: 12g
- Trans Fat: 0g
- Carbohydrates: 38g
- Fiber: 2g
- Protein: 5g
- Cholesterol: 60mg
Keywords: pistachio and blackberry olive oil cake, pistachio cake, olive oil cake, blackberry buttercream cake
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