Gluten-Free Strawberry Rhubarb Pie

The kitchen smelled like a farmers market exploded the morning I stumbled into strawberry rhubarb pie out of pure stubbornness.

My neighbor Carla brought over a paper bag bulging with rhubarb stalks from her backyard and dared me to figure out something beyond jam.

Ingredients

• Gluten free all purpose flour blend (2 1/2 cups, 300 g): Make sure your blend contains xanthan gum or the crust crumbles into sadness.
• Sugar (1 tbsp for crust, 3/4 cup for filling, 1 tsp for top): Each amount serves a different purpose so do not round or skip.
• Salt (1/2 tsp for crust, 1/8 tsp for filling): A pinch in each component keeps everything tasting intentional.
• Cold unsalted butter (1 cup, 230 g, cubed): Cold is nonnegotiable, freeze the cubes for ten minutes if your kitchen runs warm.
• Eggs (1 for crust, 1 beaten for wash): The dough egg adds structure that gluten free flour desperately needs.
• Ice water (4 to 6 tbsp): Add gradually because gluten free dough goes from perfect to soggy fast.
• Strawberries (2 cups, 250 g, hulled and sliced): Fresher berries hold their shape better during the long bake.
• Rhubarb (2 cups, 250 g, diced): Cut pieces roughly the same size as the strawberries for even cooking.
• Cornstarch (1/4 cup, 30 g): This much thickener is correct because rhubarb releases a river of juice.
• Ground cinnamon (1/4 tsp): Just enough to add warmth without screaming cinnamon.
• Lemon juice (1 tbsp): It brightens the whole filling and keeps the strawberries from tasting flat.

Instructions

Build the crust foundation:

Whisk the gluten free flour, sugar, and salt together in a large bowl, then cut in the cold butter with a pastry blender until the mixture looks like coarse sand with some pea sized bits remaining.

Bring the dough together:

Beat one egg with 4 tablespoons of ice water and drizzle it into the flour mixture gradually, tossing with a fork until clumps form and adding more water one tablespoon at a time only if dry spots remain.

Chill and rest the dough:

Shape the dough into two flat discs, wrap them tightly in plastic, and refrigerate for at least one hour so the butter firms up and the flour hydrates properly.

Preheat the oven:

Set your oven to 400 degrees F (200 degrees C) and place a baking sheet inside to heat up, which helps the bottom crust cook through.

Mix the filling:

Toss the strawberries, rhubarb, sugar, cornstarch, cinnamon, salt, and lemon juice together in a large bowl until every piece is evenly coated and the mixture looks glossy.

Roll and line the pie plate:

Roll one disc of dough between two sheets of parchment paper until it is large enough to fit a 9 inch pie plate, then gently ease it in and trim the overhang.

Fill the pie:

Pour the strawberry rhubarb filling into the lined crust and spread it into an even layer, mounding it slightly in the center.

Top and seal:

Roll out the second disc and lay it over the filling as a solid top or lattice, then crimp the edges firmly and cut a few slits for steam if using a solid top.

Glaze and bake:

Brush the top crust with the beaten egg, sprinkle with sugar, and bake on the preheated baking sheet for 45 to 50 minutes until deeply golden and bubbling through the vents.

Cool before slicing:

Let the pie rest on a wire rack for at least 2 hours so the filling sets and does not flood your plate when you cut into it.

Save

Carla sat on my back porch that evening with a slice on a paper plate and declared it better than any bakery pie she had ever paid for.

Serving Suggestions

A scoop of vanilla bean ice cream melting over a warm slice creates a creamy contrast that tames the tang of the rhubarb beautifully.

Flavor Variations

Swap half the strawberries for raspberries when you want a deeper berry flavor or add a teaspoon of grated fresh ginger to the filling for a subtle kick.

Storing and Making Ahead

The pie keeps well covered at room temperature for up to two days and refrigerated for four days.

• Reheat individual slices in a 300 degree oven for ten minutes to revive the crust.
• You can assemble the whole pie a day ahead and bake it fresh the next morning.
• Always check that your flour blend carries a certified gluten free label to avoid cross contamination.

Save

Every spring now Carla shows up with rhubarb and I always have strawberries waiting.

Recipe FAQs

→ How do I prevent a soggy bottom?

Use a starch thickener (cornstarch or tapioca) in the filling, toss fruit to coat and let juices sit briefly before filling. Bake the pie on a rimmed baking sheet to concentrate heat and ensure the filling bubbles, and allow the pie to cool for at least 2 hours to set before slicing.

→ Can I make the crust ahead of time?

Yes. Form the dough into discs, wrap tightly and refrigerate for up to 48 hours. For longer storage, freeze for up to 1 month and thaw in the refrigerator before rolling. Keeping the dough cold helps achieve a flakier crust.

→ What can I use instead of cornstarch?

Tapioca starch or arrowroot are excellent substitutes and give a glossy filling; use them in a 1:1 ratio with cornstarch. All-purpose flour will work but may yield a less clear filling and a slightly denser texture.

→ How can I make this without egg or dairy?

Use a plant-based butter for the crust and bind the dough with a flax egg (1 tbsp ground flax + 3 tbsp water = 1 flax egg). Brush the top with non-dairy milk or a light syrup before baking to encourage browning.

→ How do I balance the sweetness and tartness?

Taste the filling before baking and adjust sugar to preference; a tablespoon of lemon juice brightens flavors. If rhubarb is very tart, increase sugar slightly or mix in a few extra strawberries or a bit of honey to soften the edge.

→ Any tips for a neat lattice or top crust?

Chill both dough discs before working, roll between parchment for easy handling, and keep strips cold as you weave. Use a sharp knife or pastry wheel for clean edges, and crimp firmly to seal so filling doesn't leak during baking.