Blueberry and Peach cobbler is a delicious combination of summertime fruit that switches up the typical cobbler. This recipe is perfect for any occasion!
In a large bowl, combine one of the blueberries, peaches, sugar, cornstarch, and lemon zest.
Spray an 8x8 baking with cooking spray. Pour filling mixture into the dish and make sure it's spread evenly using a rubber spatula.
Place the pie crust on top of the filling, tucking under any edges that don't quite fit. If you have a lot of excess crust, trim it off with a sharp knife or kitchen shears.
Brush the the top with the egg was and cut four vent slits in any pattern in the top of the dough.
Sprinkle with the caster sugar.
Bake at 375 degrees F for about 45 minutes, or until the crust is dark golden brown.
Notes
If you would like a recipe for homemade pie crust, try my all-butter pie crust recipe!Caster sugar is also called sugar in the raw or turbinado sugar.