Blueberry Pop Tarts

1. Preheat oven to 350º.
2. Whisk together the flour, sugar, and salt in a large bowl.
3. Blend the chilled butter into the flour mixture with your hands or a pastry blender until the butter is about pea sized.
4. Pour the water over the flour mixture and stir together until it begins to form into a dough.
5. Form the dough into a disk, wrap in plastic wrap, and chill for 20-30 minutes.
6. While the dough chills, prep the filling.
   • If you're using frozen blueberries, stir together the blueberries, sugar, and cornstarch in a nonstick pan over medium heat until blueberries burst and the mixture begins to thicken. You can also smush down the blueberries with the back of the spoon. Transfer to a heat safe bowl and set aside.
   • If you're using blueberry jam, wait until you have your rectangles cut out to mix the blueberry jam and cornstarch together in a small bowl.
7. Roll the dough out onto a lightly floured surface until it is about 1/8" thick. Using a ruler and a pastry roller or pizza cutter, cut the dough to 9" x 12".
8. On the 12" side, cut it into thirds so that each column measures about 4" wide.
9. Turn the rectangle 90 degrees to the 9" side and cut it in half so that there are now six rectangles each measuring 4.5" x 4."
10. Place the six rectangles on a parchment lined baking sheet and place back into the fridge to chill for another 15-20 minutes.
11. Whisk together the egg and water in a small bowl to make the egg wash.
12. Transfer filling to a pastry bag.
13. Carefully pipe the blueberry filling into the center of three of the rectangles.
14. Brush one side of the remaining three rectangles with egg wash and place the egg wash side down over the filling, pressing down around it gently to seal it in.
15. Place the cookie sheet back into the fridge to let the pop tarts chill slightly.
16. Cut off any excess dough to make the edges look neat. Use a fork and gently press down around the edges of each pop tart to crimp them and fully seal each side.
17. Poke holes in the top of each pop tart with a toothpick or fork and then brush the tops of each with egg wash.
18. Bake the pop tarts for 30-35 minutes or until they are golden brown.
19. Once the pop tarts are out of the oven, sift the powdered sugar into a bowl. Whisk in the milk and vanilla.
20. Transfer icing to a pastry bag and pipe onto pop tart. Top with sprinkles. Let the icing set slightly before eating. Enjoy!