Chocolate Dough

1. Preheat oven to 350º F.
2. Whisk together the flour, cocoa powder, 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, place the chopped chocolate in a heat safe bowl. Place the heavy cream in a smaller heat safe bowl and microwave for 10 second intervals, stirring in between until the cream is hot.
7. Pour the cream over the chocolate and stir until combined. Reheat for 10 seconds if the chocolate isn't fully melted. Set aside to cool slightly.
8. 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".
9. On the 12" side, cut it into thirds so that each column measures about 4" wide.
10. 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.”
11. Place the six rectangles on a parchment lined baking sheet and place back into the fridge to chill for another 15-20 minutes.
12. Whisk together the egg and water to make the egg wash.
13. Transfer half of the hot fudge filling to a pastry bag. Cover the other half with plastic wrap and place iin the fridge to chill as you'll use it for the drizzle.
14. Gently pipe the fudge filing into the center of three of the rectangles, making sure to divide it evenly and keep it as close to the centers as possible.
15. Brush the edges of those rectangles with a little bit of egg wash. Brush one side of the remaining three rectangles with egg wash and place the egg wash side down over the fudge filling, pressing down around it gently to seal in the filling. Wipe up any filling that leaks out.
16. Place the cookie sheet back into the fridge to let the pop tarts chill slightly.
17. Use a fork and gently press down around the edges of each pop tart to crimp them and fully seal each side. You can gently trim any excess or uneven edges.
18. Poke holes in the top of each pop tart with a toothpick or fork. Bake the pop tarts for 35-37 minutes. Let them cool on the baking sheet for 10 minutes before moving them to a cooling rack.

Vanilla Frosting

1. Sift powdered sugar and meringue powder into a large bowl. Add milk and vanilla mix together until combined.
2. Transfer the frosting to a piping bag and carefully pipe the frosting onto each poptart without getting to close to the edge. Use an offset spatula to smooth it out.
3. Remove the plastic wrap on the leftover fudge filling and heat for 5 seconds in the microwave until it is pipe-able consistency without being too runny. Transfer to a piping bag with a small round tip and pipe onto the white frosting in two overlapping squiggles.
4. Top with rainbow sprinkles. Enjoy!