Ingredients
Method
Preparation
- Preheat your oven to 425°F (220°C). Position a rack in the lower third of the oven.
- In a large bowl, gently combine blueberries, raspberries, blackberries, sugar, cornstarch, lemon juice, and vanilla. Mix carefully to avoid breaking down the raspberries.
- Roll out your pie crust and fit it into a 9-inch pie pan, pressing gently to remove air pockets. Trim excess dough, leaving a little overhang if you plan to crimp the edge.
- Pour the berry mixture into the crust and spread evenly.
- Top with a second crust or create a lattice. Cut vents in the top crust to release steam.
- Brush the top crust with the beaten egg for a shiny finish.
Baking
- Bake at 425°F for 45–50 minutes, or until the crust is deeply golden and the filling is bubbling.
- Cool the pie on a rack for at least 2 hours so the filling sets before serving.
Notes
If using frozen berries, toss them frozen to reduce excess juice. For a less-sweet pie, drop sugar to 1/2 cup and taste. Gluten-free crusts work fine; adjust bake time.
