Preheat the oven to 400 F / 200 C for 15-20 minutes. Grease the pie baking dish and lay the pie crust carefully. Leave the edge around.
In a large bowl, combine apples, cranberries, cornstarch, sugar, cinnamon and lemon juice. Place on the pie crust.
Cut the second crust in 2-inch strips with a sharp knife or pastry wheel and braid over the cranberry apple filling. Roll the edge around the pie dish and press with a fork.
Brush with egg or milk wash. Sprinkle some more brown sugar on top. Place in the middle of the oven and bake for 30 minutes.
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Notes
Opt for firm, tart apples like Granny Smith or Honeycrisp to balance the sweetness of the cranberries.
Using a mix of apples can add flavor.
Precooking the apple and cranberry filling slightly on the stovetop can help release excess moisture and ensure a perfectly thickened filling.
If using a frozen pie crust, bring to to room temperature before rolling out.
Fresh or frozen cranberries provide the best flavor and texture. Dried or canned cranberries are not recommended.
Placing the pie on a preheated baking sheet can help ensure a crisp bottom crust.
Storage - keep in an airtight container at room temperature for 2 days, or store in the fridge for up to 5 days.