Prepare two baking sheets by lining them with parchment paper.
Prepare a piping bag (preferably a heavy-duty piping bag made from a thicker material so it won't burst from the thick dough) and a small open star piping tip (mine is a little less than 1/2 inch or 11 mm in diameter, an open star piping tip similar to Wilton #21 or Ateco #826). You can see step-by-step photos in the body of the post for reference.
Add all the ingredients for the dough to a mixing bowl and combine them by hand or using a wooden spoon until a dough forms.
Fill the piping bag with the dough and push the dough towards the piping tip using a bench scraper.
Pipe crescent-shaped cookies (or any other shape you want) onto the baking sheet.
Piping Spritz dough shouldn’t be too easy—that’s how it should be. If you weigh the ingredients with a scale, the dough should come out perfect, but if you’re using measuring cups, you might need to adjust the consistency. If the dough is so firm that piping is very hard or impossible, take it out of the bag and add a small amount of milk, then try again. On the other hand, if the dough is very soft and almost too easy to pipe, you may need to add a bit more flour. The cookies will still turn out fine, but the pattern on the cookies may be less distinct.
Place the baking sheet with the piped cookies in the fridge for 15 minutes.
Bake at 350°F (180°C) for 12–13 minutes, or until the edges of the cookies are slightly golden. If using a dark baking sheet, they will bake faster, so check on them after the 10-minute mark. If the edges are golden, they are done. The baking time may also vary depending on your oven.
Let the cookies cool briefly on the baking sheet. When they are cool and stable enough to handle, transfer them to a cooling rack and let them cool completely.
When the cookies are cooled, spread jam on half of the cookies and cover them with the remaining halves.
Melt the chocolate and dip the tips of the cookies in it. Place them on the cooled baking sheet or cooling rack until the chocolate sets.
Enjoy!