Ingredients
Equipment
Method
Preheat and assemble
- Preheat oven to 400°F and line a 9-inch pie plate with bottom crust.
- Combine rhubarb, strawberries, sugar, cornstarch, salt, and vanilla extract in a large bowl.
- Let the fruit mixture sit for 10 minutes to thicken slightly.
- Pour the fruit mixture into the bottom crust and dot with butter.
Top crust and bake
- Top with the second crust, trim excess, and crimp the edges to seal.
- Cut decorative vents in the top crust so steam can escape.
- Brush the top with beaten egg and sprinkle with sugar.
- Bake 20 minutes at 400°F until the crust starts setting and edges look lightly colored.
- Reduce oven to 350°F and bake 35-40 minutes more until the crust is golden and the filling is bubbling through vents.
Cool and serve
- Cool completely for at least 4 hours before slicing so the filling fully sets.
Notes
For the clearest jewel-toned filling, bake on a preheated sheet pan and rotate the pie once during the 350°F stage so the vents brown evenly. Refrigerate covered up to 4 days; rewarm slices briefly in a 300°F oven. Freezing: yes—freeze whole or sliced up to 2 months, thaw in the fridge overnight. For a lower-sugar option, replace part of the sugar with a 1:1 baking sweetener, keeping the cornstarch the same to preserve the thick gel texture.
