March 31st, 2016
In a large bowl, combine peaches, blackberries, lemon juice and vanilla. Sprinkle with granulated sugar and gently toss to coat. Let stand for 15 minutes.
Meanwhile, in a medium bowl, combine flour, oats, brown sugar and cinnamon. Using a pastry blender or fork, cut in butter until crumbly.
Fold up the sides of each prepared foil sheet, creating a bowl shape. Divide blackberry mixture among packets, dividing evenly. Sprinkle evenly with crumb mixture. Fold foil into tent-style packets and seal edges tightly.
Place packets on preheated grill and cook for 15 minutes. Open packets with caution, allowing steam to escape, and cook for 3 to 4 minutes or until crumble mixture is golden brown and peaches are softened.