Embrace the best of late spring and early summer flavors with this stunning and surprisingly simple Rhubarb Blueberry Galette. This free-form tart showcases the perfect balance between tart rhubarb and sweet, plump blueberries nestled in a flaky, buttery crust. It’s the quintessential rustic dessert that looks incredibly impressive but requires minimal fuss.

Why You Will Love This Recipe

This Rhubarb Blueberry Galette is a showstopper without the commitment of a traditional pie. The beauty of a galette lies in its imperfection; it’s rustic, quick to assemble, and always looks charmingly homemade. The bright, slightly acidic flavor of the rhubarb cuts beautifully through the sweetness of the blueberries, creating a complex and refreshing filling. Furthermore, the crust bakes up golden brown and shatteringly crisp thanks to the high butter content, offering a delightful textural contrast to the soft, juicy fruit.

Ingredients

• 2 cups all-purpose flour
• 1 teaspoon granulated sugar (for the crust)
• 1/2 teaspoon fine sea salt (for the crust)
• 1 cup (2 sticks) unsalted butter, very cold and cubed
• 1/2 cup ice water (approximately)
• 3 cups fresh rhubarb, chopped into 1-inch pieces
• 2 cups fresh or frozen blueberries
• 3/4 cup granulated sugar (for the filling)
• 2 tablespoons cornstarch
• 1 teaspoon vanilla extract
• 1 tablespoon fresh lemon juice
• 1 large egg, beaten (for egg wash)
• 1 tablespoon turbinado sugar (for sprinkling)

Step-by-Step Instructions

1. Prepare the Crust: In a large bowl, whisk together the flour, 1 teaspoon of sugar, and salt. Cut in the cold butter using a pastry blender or your fingertips until the mixture resembles coarse crumbs with some pea-sized pieces of butter remaining. Gradually drizzle in the ice water, mixing until the dough just comes together. Form into a disk, wrap tightly in plastic wrap, and chill for at least 1 hour.
2. Prepare the Filling: In a separate bowl, gently combine the chopped rhubarb and blueberries. In a small bowl, whisk together the 3/4 cup sugar, cornstarch, vanilla extract, and lemon juice until smooth. Pour the sugar mixture over the fruit and toss gently to coat evenly. Set aside while you roll out the dough.
3. Roll the Dough: Preheat your oven to 400°F (200°C). Line a large baking sheet with parchment paper. On a lightly floured surface, roll the chilled dough into a rough 14-inch circle, about 1/8 inch thick. The edges do not need to be perfect. Carefully transfer the dough circle onto the prepared baking sheet.
4. Assemble the Galette: Spoon the rhubarb blueberry filling into the center of the dough, leaving a generous 2-inch border all around.
5. Fold the Edges: Gently fold the dough border up and over the outer edge of the filling, overlapping the dough as you go to create a rustic rim. Do not worry about crimping; scrunching the dough inward is part of the galette charm.
6. Finish and Bake: Brush the exposed pastry edges with the beaten egg wash, then sprinkle generously with turbinado sugar for crunch and shine.
7. Bake for 40 to 50 minutes, or until the crust is deep golden brown and the fruit filling is bubbly and thickened.
8. Cool Slightly: Let the Rhubarb Blueberry Galette cool on the baking sheet for at least 20 minutes before slicing and serving. This allows the filling juices to set slightly.

Expert Tips / Pro Tips

Keep the Butter Cold: The secret to an incredibly flaky crust is ensuring the butter remains frigid. If your kitchen is warm, chill the flour mixture briefly before adding the water.

Don’t Overwork the Dough: Mix the dough just until it comes together. Overmixing develops gluten, resulting in a tough crust rather than a tender, flaky one.

Pre-Soaking Rhubarb: Rhubarb can sometimes be quite tart. If you prefer a sweeter result, toss the chopped rhubarb with 1 tablespoon of the filling sugar and let it sit for 15 minutes before mixing with the blueberries and the rest of the sugar mixture. Drain off any excess liquid that pools at the bottom.

Preventing a Soggy Bottom: Baking the galette on a preheated baking stone or steel can help the bottom crust cook through faster, preventing it from becoming soggy from the fruit juices.

Variations & Substitutions

Spice it Up: Add 1/2 teaspoon of ground cinnamon or a tiny pinch of ground cardamom to the filling mixture for added depth.

Add Citrus Zest: Incorporate the zest of one lemon or orange into the sugar mixture for an intensified bright flavor profile.

Different Berries: Feel free to substitute half of the blueberries with raspberries, blackberries, or even sliced strawberries, though you may need to slightly reduce the sugar depending on the sweetness of the added fruit.

Gluten-Free Crust: Use a high-quality 1-to-1 gluten-free flour blend when preparing the dough.

Serving Suggestions

This delightful Rhubarb Blueberry Galette is perfect served warm. A classic accompaniment is a generous scoop of high-quality vanilla bean ice cream, allowing the melting ice cream to mingle with the warm fruit juices.

Alternatively, serve with fresh whipped cream or a dollop of crème fraîche for a tangy counterpoint to the sweetness.

For breakfast or brunch, thin slices pair wonderfully with a drizzle of maple syrup.

Storage, Freezing & Reheating

Storage: Store leftover Rhubarb Blueberry Galette at room temperature, loosely covered, for up to 2 days. Avoid refrigerating the whole galette if possible, as this can cause the crust to become soft and lose its flakiness.

Freezing: While the baked galette freezes well, the crust texture can slightly diminish upon thawing. Cool the galette completely, wrap it tightly in plastic wrap and then foil, and freeze for up to 2 months. Thaw overnight in the refrigerator before serving.

Reheating: To restore crispness, reheat individual slices in a toaster oven or conventional oven at 350°F (175°C) for about 5 to 8 minutes until warmed through.

Nutrition Information

Please note that this is an approximation based on the ingredients listed above, serving 8 slices. Exact nutritional values will vary based on specific product brands and ingredient measurements.

FAQ

How do I keep the rhubarb from being too tart?

The combination of sugar and starch in the filling helps balance the tartness. If you find rhubarb inherently too sharp, you can blanch the chopped rhubarb briefly (1 minute) in boiling water before mixing it with the filling ingredients, which slightly softens the acidity.

Can I make the dough ahead of time?

Yes, the dough for this Rhubarb Blueberry Galette can be made up to 2 days in advance. Wrap it tightly in plastic wrap and store it in the refrigerator. Allow it to sit on the counter for about 10-15 minutes before rolling it out to make it pliable.

What should I do if my filling seems too wet before baking?

If your fruit releases a lot of juice while waiting, you can gently spoon some of excess liquid off the top before transferring the fruit into the pastry base. The cornstarch helps absorb moisture during baking, but too much liquid can still cause spreading.

How can I ensure the bottom crust cooks through?

Baking on a preheated baking sheet or pizza stone is highly recommended. Also, ensure your oven temperature is accurate. If the edges start browning too fast before the center is set, loosely tent the edges with aluminum foil for the last 10-15 minutes of baking.

Rhubarb Blueberry Galette

A rustic and free-form tart featuring a flaky, buttery crust filled with a vibrant mix of tart rhubarb and sweet blueberries, finished with a light dusting of sugar.

Print Recipe Pin Recipe

Prep Time 35 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr 20 minutes mins

Servings: 6 slices

Course: Dessert, Pastry

Cuisine: American

Calories: 310

Ingredients Method Notes

Ingredients

  

For the All-Butter Crust

• 2.5 cups All-purpose flour
• 1 teaspoon Granulated sugar
• 1 teaspoon Salt
• 8 ounces Unsalted butter, very cold and cubed
• 0.5 cup Ice water More as needed

For the Filling

• 1 pound Rhubarb, chopped into 1-inch pieces About 4-5 stalks
• 1.5 cups Fresh blueberries
• 0.75 cup Granulated sugar Adjust based on fruit tartness
• 3 tablespoons Cornstarch
• 1 tablespoon Lemon zest
• 1 teaspoon Vanilla extract

For Assembly & Glaze

• 1 large Egg Beaten with 1 tsp water for egg wash
• 2 tablespoons Turbinado sugar (or coarse sugar) For sprinkling

Method

 

Instructions

1. Prepare the Crust: In a food processor, pulse the flour, sugar, and salt. Add the cold butter cubes and pulse until the mixture resembles coarse crumbs with some pea-sized butter pieces remaining. Gradually drizzle in the ice water while pulsing until the dough just begins to come together.
2. Shape and Chill Dough: Turn the dough out onto a lightly floured surface, gather it into a disk, wrap tightly in plastic wrap, and refrigerate for at least 1 hour.
3. Prepare the Filling: In a large bowl, gently toss together the chopped rhubarb, blueberries, sugar, cornstarch, lemon zest, and vanilla extract until the fruit is evenly coated. Set aside while you roll the dough.
4. Assemble the Galette: Preheat oven to 400°F (200°C). On a sheet of parchment paper, roll the chilled dough into a rough 14-inch circle (it doesn’t need to be perfect). Transfer the parchment and dough onto a baking sheet.
5. Fill and Fold: Mound the fruit mixture in the center of the dough, leaving a 2-inch border clear around the edge. Fold the border up and over the edges of the fruit, pleating the dough as necessary to form a rustic border. Brush the folded crust edges with the egg wash and sprinkle generously with turbinado sugar.
6. Bake: Bake for 40 to 45 minutes, or until the crust is deep golden brown and the filling is bubbling thickly. If the crust begins to brown too quickly, loosely tent it with aluminum foil.
7. Cool and Serve: Allow the galette to cool on the baking sheet for at least 20 minutes before slicing and serving. This allows the filling to set properly.

Notes

This galette is best served warm with a scoop of vanilla bean ice cream or a dollop of fresh whipped cream. The tartness of the rhubarb balances the sweetness of the blueberries perfectly.