In just a flash, I transformed a simple craving into a delightful dessert—a Vegan No-Bake Blackberry Mousse Tart that instantly upgraded my weeknight routine. Tantalizing with its creamy berry filling nestled in a decadent Oreo crust, this no-bake sensation takes only 10 minutes to prepare. One of its irresistible perks? It’s perfect for plant-based diets, so everyone can indulge without sacrificing flavor. The best part? You can whip it up quickly and spend less time in the kitchen while impressing your guests with a stunning and delicious treat. So, ready to let your inner chef shine while crafting this vibrant tart? Let’s dive into the recipe!

Why is this tart a must-try?
Wholesome Ingredients: Crafted with fresh blackberries, this tart offers a deliciously fruity flavor that packs a nutritious punch. Quick to Make: You can whip it up in just 10 minutes, making it a perfect last-minute treat for any gathering. Visual Appeal: The stunning contrast of the dark crust and vibrant berry filling makes it a showstopper on any dessert table. Versatile Options: Feel free to experiment with different fruits like strawberries or raspberries, so you can enjoy variations any time. If you’re feeling adventurous, check out my recipe for Bake Pecan Pie or try making Bake Blueberry Cheesecake for your next dessert. Dairy-Free Delight: Made without dairy, this tart ensures everyone can savor each bite without concern. Enjoy the flavors!
No-Bake Blackberry Mousse Tart Ingredients
For the Crust
• Oreo Cookies – The foundation of this tart, offering a sweet, chocolaty flavor; feel free to substitute with any cream-filled cookies.
• Vegan Butter – Acts as a binding agent to hold your crust together; coconut oil can be used if preferred.
For the Mousse Filling
• Blackberries & Blueberries – The stars of your mousse, giving it a fruity flavor; you can use a total of 225g and swap for raspberries or strawberries based on availability.
• Non-Dairy Cream Cheese – Provides a rich creaminess; drained yogurt is a good alternative for a lighter version.
• Sugar – Sweetens the mousse; adjust to your taste for the perfect balance.
• Vanilla Extract – Enhances the overall flavor profile; no direct substitutes are recommended for the best results.
• Non-Dairy Whipping Cream – For that fluffy, light texture; chilled coconut cream can work well in a pinch.
• Non-Dairy Milk – Essential for dissolving agar-agar; choose any type you have on hand.
• Agar Powder – A vegan gelling agent for setting the mousse; if you’re not vegan, gelatin can be used as a substitute.
This delightful No-Bake Blackberry Mousse Tart is sure to become a favorite among your collection of quick desserts!
Step‑by‑Step Instructions for No-Bake Blackberry Mousse Tart
Step 1: Prepare the Crust
Begin by crushing the Oreo cookies in a blender until they are finely ground, resembling sand. In a mixing bowl, combine the crushed cookies with melted vegan butter and mix thoroughly until the mixture holds together. Press the cookie mixture firmly into a 9-inch tart pan, ensuring an even layer. Place the crust in the freezer for 15 minutes to set up nicely.
Step 2: Make Mousse Filling
While the crust is chilling, blend together the blackberries and blueberries in a food processor until smooth. If you prefer a seedless texture, strain the mixture through a fine sieve. In a separate bowl, combine the berry puree with non-dairy cream cheese, sugar, and vanilla extract, blending until the mixture is creamy and well incorporated, creating a luscious base for your No-Bake Blackberry Mousse Tart.
Step 3: Whip the Cream
Take your non-dairy whipping cream and whip it in a chilled mixing bowl until stiff peaks form—this should take about 3 to 5 minutes with an electric mixer. Once whipped, refrigerate the bowl to keep the cream airy and light while you prepare the next steps of your tart.
Step 4: Prepare Agar Mixture
In a small saucepan, combine the agar powder with non-dairy milk and bring it to a gentle boil over medium heat, stirring constantly for about 2 minutes until the agar fully dissolves. Remove from heat and let it cool slightly, ensuring it remains liquid for mixing into the mousse filling, which helps give the No-Bake Blackberry Mousse Tart its ideal texture.
Step 5: Combine Mixtures
Once the agar mixture has cooled to room temperature, gently fold it into the berry puree. Use a spatula to ensure the mixtures are well combined without deflating the whipped cream. Then, carefully fold in the chilled whipped cream until just incorporated, creating a light and fluffy mousse filling that perfectly complements the crust.
Step 6: Fill Tart
Pour the mousse mixture into the prepared Oreo crust, smoothing the top with a spatula for a clean finish. Cover the tart with plastic wrap and place it in the refrigerator to chill for at least 4 hours, or ideally overnight, until the filling is set and firm to the touch, allowing for a delightful bite of this No-Bake Blackberry Mousse Tart.
Step 7: Serve & Decorate
Once the tart has set, gently remove it from the pan by carefully loosening the edges. Transfer the tart to a serving plate and decorate with fresh blackberries or other seasonal fruits for a pop of color. Optionally, you can drizzle with whipped coconut cream for an added indulgence before serving, creating a stunning presentation for your guests.

Make Ahead Options
These Vegan No-Bake Blackberry Mousse Tarts are a lifesaver for busy home cooks looking to save time without sacrificing flavor! You can prepare the crust and mousse filling up to 24 hours in advance. To do this, make the crust and freeze it for 15 minutes to set, then pour the mousse filling into the crust and refrigerate it right away. Cover it tightly with plastic wrap to maintain freshness and prevent any odors from the fridge invading your tart. When you’re ready to serve, simply remove it from the fridge, garnish with fresh fruits, and enjoy a stunning dessert that tastes just as delightful as if made the same day!
Storage Tips for No-Bake Blackberry Mousse Tart
Fridge: Store the tart in an airtight container in the refrigerator for up to 3 days. Keep it covered to prevent it from absorbing any odors.
Freezer: This tart does not freeze well, as freezing alters its creamy texture and taste. It’s best enjoyed fresh or within a few days.
Preparation Ahead: Feel free to make the tart a day in advance. It will set nicely in the fridge, allowing the flavors to meld beautifully.
Serving Reminder: Before serving leftovers, give the tart a gentle stir if it’s been sitting in the fridge, as the mousse may settle slightly. Enjoy each delightful bite!
Expert Tips for No-Bake Blackberry Mousse Tart
- Chill Ingredients: Ensure your non-dairy whipping cream is super chilled before whipping; it’ll achieve better peaks for the mousse texture.
- Agar Awareness: If you’re substituting gelatin for agar in your No-Bake Blackberry Mousse Tart, simply mix it without cooking—this makes it easier to incorporate smoothly.
- Berry Bliss: Feel free to experiment with the berry mixture; just remember that different fruits will alter the flavor and color—stick to the basics for best results!
- Strain for Smoothness: If you prefer a silky mousse, strain your berry puree to remove any seeds or lumps before incorporating it with the cream cheese.
- Set Time Matters: Patience is key! Allowing the tart to chill for at least 4 hours ensures the mousse has enough time to firm up for perfect slicing.
What to Serve with Easy Vegan No-Bake Blackberry Mousse Tart
Elevate your dessert experience by pairing this indulgent tart with complementary dishes that enhance its delightful berry flavor.
-
Fresh Fruit Salad: The vibrant, juicy medley of seasonal fruits adds a refreshing touch that balances the creamy tart and enhances its fruity notes.
-
Coconut Whipped Cream: A dollop of fluffy coconut cream takes this dessert to new heights, adding richness without overshadowing the berry mousse’s brightness.
-
Chocolate Drizzle: Drizzling melted dark chocolate over the tart creates an irresistible contrast, adding depth and a hint of indulgence.
-
Sparkling Water with Lime: A refreshing, bubbly drink with a citrus twist cleanses the palate and elevates the dessert experience, allowing the tart’s flavors to shine.
-
Almond Biscotti: This crunchy treat complements the smooth mousse, providing a delightful textural contrast while accentuating the tart’s fruity components.
-
Herbed Lemon Sorbet: The zesty and herbal notes of sorbet provide an unexpected yet delightful counterpoint to the sweetness of the mousse, creating a balanced finish to your meal.
-
Vegan Cheesecake Bites: Pairing with these treats allows for a texture contrast and rich flavor, excellent for those who enjoy a variety of sweet indulgences.
-
Red Wine Spritzer: A light, fruity red wine spritzer adds a sophisticated touch to your serving experience, enhancing the tart’s berry flavors with each sip.
-
Chocolate-Covered Strawberries: An eye-catching treat that echoes the berry theme while providing a delightful burst of flavor that complements the mousse beautifully.
No-Bake Blackberry Mousse Tart Variations
Feel free to explore and personalize this tart to your taste preferences—there’s no wrong way to create a masterpiece!
-
Berry Swaps: Use raspberries, strawberries, or peaches instead of blackberries and blueberries for deliciously different flavor profiles. Each fruit brings its own cheer to the creamy mix!
-
Seasonal Fruits: Try adding a layer of plums or edible flowers for a decorative twist, elevating not just the taste but also the visual appeal of your tart.
-
Nutty Crust: For a twist on the crust, replace the Oreo cookies with crushed almond cookies or pecan crust for a nutty crunch that pairs beautifully with the mousse.
-
Flavor Infusions: Incorporate a splash of lemon or orange zest into the mousse filling for a zesty brightness that complements the tartness of the berries, making every bite sing!
-
Different Creams: Experiment with coconut yogurt instead of non-dairy cream cheese for a tropical note—its subtle sweetness will beautifully enhance the berry flavors.
-
Whipped Topping: Instead of whipped coconut cream, drizzle with a chocolate ganache or a berry compote to add an indulgent touch that shimmers with flavor.
-
Add a Kick: For those who appreciate heat, sprinkle in a pinch of cayenne pepper or a few drops of jalapeño juice to the berry mix—it’s an adventurous way to surprise your taste buds!
-
No-Gelatin: If looking for a simpler texture, skip the agar and go for silken tofu, blended into a creamy paste for a creamy filling without any gelling agents.
No matter how you choose to adapt this delicious tart, I’m confident it will be a hit! If you’re in the mood for more creativity, consider making some delightful Bake Pecan Pie or a stunning Bake Blueberry Cheesecake for your next dessert event. Enjoy the journey of flavors!

No-Bake Blackberry Mousse Tart Recipe FAQs
How do I select ripe blackberries for the mousse?
Absolutely! When choosing blackberries, look for ones that are plump and firm with a deep purple-black color. Avoid any that have dark spots all over or are overly soft, as these may be overripe or spoiled. Fresh blackberries should have a slight sheen and should not be squished to the point where they ooze juice.
How should I store leftover No-Bake Blackberry Mousse Tart?
Store any leftovers in an airtight container in the refrigerator for up to 3 days. Be sure to cover it well to prevent it from absorbing any odors. The tart can also be made a day in advance, which allows the flavors to further develop and meld beautifully.
Can I freeze the tart for later use?
This tart does not freeze well because freezing can significantly alter its creamy texture and flavor. If you want to prep ahead, the best strategy is to prepare and chill the tart in the fridge. It will maintain its delicate consistency when stored properly in the refrigerator.
What are common issues with making the mousse?
If your mousse doesn’t set properly, it may be due to the agar not dissolving fully. Make sure to stir the agar mixture continuously while heating it in non-dairy milk until it is completely dissolved. Ensure the mixture has cooled slightly before incorporating it with the other ingredients to prevent deflating your whipped cream; gently folding them together will also help maintain the airy texture.
Are there any dietary considerations for this tart?
This No-Bake Blackberry Mousse Tart is vegan-friendly and does not contain dairy or eggs, making it suitable for plant-based diets. However, if you or someone you’re serving has nut allergies, be cautious about your choice of non-dairy cream and milk, as some brands may use nuts in their products. Always check the labels for cross-contamination if strict adherence to dietary restrictions is necessary.

Irresistible No-Bake Blackberry Mousse Tart You’ll Adore
Ingredients
Equipment
Method
- Crush the Oreo cookies in a blender until finely ground. Combine the crushed cookies with melted vegan butter and press into a 9-inch tart pan. Freeze for 15 minutes.
- Blend blackberries and blueberries in a food processor until smooth. Strain if a seedless texture is preferred. In a separate bowl, mix berry puree with non-dairy cream cheese, sugar, and vanilla extract until creamy.
- Whip non-dairy whipping cream in a chilled bowl until stiff peaks form (3-5 minutes). Refrigerate to keep airy.
- Combine agar powder with non-dairy milk in a saucepan, bring to a gentle boil for 2 minutes. Cool slightly.
- Fold agar mixture into berry puree, then fold in the whipped cream until just combined.
- Pour mousse into the prepared crust, smooth the top, cover with plastic wrap, and refrigerate for at least 4 hours until set.
- After setting, remove from the pan, transfer to a serving plate, decorate with fresh blackberries, and optionally drizzle with whipped coconut cream before serving.
