BLESS THIS MESS
Blackberries. raspberries, strawberries, and blueberries-oh my! Berry Pie is made with alllll the berries and has the most flaky, buttery crust.
Place berries, lemon juice and sugar in 3 qt saucepan over medium high heat stirring occasionally.
Once the berries start to simmer, turn the heat down to medium and continue cooking for 5 minutes, or until the berries are very soft.
Pour about ½ cup of the juice into a bowl. Mix the cornstarch into the juice. Return cornstarch juice mixture to the pot and gently mix. Cook for 2 more minutes or until it starts to look thick. Remove from heat and add the butter, stir to combine.
With a slotted spoon, ladle berries into an 8 inch pie shell that has been placed in a pie plate.
Top pie with pie crust with hole cut into the top for venting or use lattice method. Brush the top of the pie crust with the beaten egg and sprinkle with additional sugar.
Bake at 400 degrees F. for 45 to 50 minutes. If the edges of the pie start to brown too quickly you can cover the edges with a 2 inch strip of foil around the edge of the pie.
Remove the pie from the oven and cool completely before serving.