Cut the butter into the flour, along with the salt, until reduced to pea sized lumps. You can use a hand/stand mixer or a food processor, or just do it with your fingers. Then add the corn syrup all at once and mix/blitz/stir until it forms a ball. Dust your hands with a little flour, scoop out the dough, and knead lightly until smooth.

Flatten the dough into a squarish shape, wrap in plastic, and chill 30 minutes or as long as you like. Even so long as three days.

Okay, listen up. Roll the dough to ¼”. This is important. Because each Pop-Tart will ultimately have 4 “layers” (pastry + filling + pastry + icing), you need to pay close attention to the thickness of each. So, when rolling out the dough, make sure to actually measure the thickness. If you don’t, between those layers, you could easily end up with a 1” thick Pop-Tart; frankly that sounds gross.

Take the chilled squarish lump of dough and set it onto a surface dusted in sifted powdered sugar. Roll the dough evenly both left-and-right and up-and-down, but don’t roll diagonally! This will preserve the squarish shape and minimize re-rolling. Lift and move the dough periodically to make certain it hasn’t stuck, dusting underneath as needed.

Once the dough has reached ¼” thickness and an overall square shape, use a ruler to cut it into however-many 3 ⅛” wide strips. Then, cut each strip every 4 inches. Yes. A real Pop-Tart measures exactly 3 ⅛” by 4”.

Use a ruler so you can impress your friends with your mad Pop-Tart skills. Sloppy, irregularly shaped Pop-Tarts won’t impress anyone.

Gather the scraps, knead them very lightly into a smooth ball, re-roll and cut another round of rectangles. Altogether, the dough will withstand 3 rounds of rolling in your quest for 24 pieces. The dough is ultra forgiving.

Store the rectangles on a parchment or wax paper lined cookie sheet, covered in plastic, in the refrigerator until needed.

Have the Pop-Tart filling ready. You can either use a pastry bag and pipe the filling directly onto the Pop-Tarts, or you can roll the paste out between two sheets of plastic wrap and cut it to size. I’ve described both methods in detail here.

Once 12 dough pieces have their fruit filling, top them with the remaining dough pieces. Smooth the dough over the fruit filling and gently press out any air bubbles. The rounded end of a bench knife or the handle of a wooden spoon, makes a great tool for sealing the edges smoothly.

You don’t have to press very hard, the dough pieces will naturally bake together. The most important part is to simply press out any air between the filling and the pastry.

Just to reiterate, and for some this may be difficult: do not use a fork to crimp the edges! I mean geeze, have you ever seen a Pop-Tart before? They totally do not have crimped edges. Don’t ruin this, you’ve come so far!

Once you’ve smoothly sealed the edges of the Pop-Tart, carefully dock each one with a fork, about eight times (two rows of four). Pricking them lightly with a fork creates small steam vents to prevent them from puffing up in the oven.

Transfer the Pop-Tarts to a parchment lined cookie sheet and bake for about 20 minutes, until lightly browned all over. You don’t want them “golden brown” by any means, real Pop-Tarts look downright anemic.

Occasionally, a Pop-Tart or two will spread somewhat irregularly during baking. While they’re still warm from the oven, you can trim the edges again quite easily with a bench scraper or knife.

Cool thoroughly.

Use a clean towel or dry pastry brush to dust off each Pop-Tart, removing any stray crumbs.

Combine all of the icing ingredients in a bowl and mix until a smooth paste forms. Put some of the icing into a piping bag fitted with a small, plain tip. Pipe a boarder of icing around the perimeter of each tart, leaving about a ¼” margin.

Thin the remaining icing, a tablespoon of water at a time, until it reaches a pourable consistency. Pour a tablespoon of icing onto each tart and use the tip of a metal spatula to help it reach all of the corners. Pop-Tarts only have a thin smear of icing on top, so easy does it.

Let the icing dry for about 3 minutes or so before adding the sprinkles. Homemade or store bought, the sprinkles tend to bleed if they go on too soon.

The Pop-Tarts now need to dry, excruciatingly, overnight. They taste waaaaay too fresh the first day, and the icing will still be sort of damp and moist inside, which isantithetical to the Pop-Tart experience. After 12 hours of air-time, you’ll have unbelievable Pop-Tart perfection.