Preheat the oven to 350 °F (175 °C).
Line a large cookie sheet with a piece of parchment paper.
Roll one of the discs out onto a non-floured piece of parchment paper. You can place either plastic wrap (that the piece the disc was rolled in) or parchment paper on top of the dough to create a barrier between the dough and the rolling pin.
Roll the dough out to be about 1/8” (.3 cm) thick.
Use a round cookie cutter (mine was 2.25” (5.7 cm) to cut out solid circles and circles with a cut-out (you want the same number of both). The disc of dough was 415 grams and each set of circle + circle with a cut-out was 29 grams, so with this disc of dough, you should be able to make 14 Linzer cookies (so that’s 14 solid circles + 14 circles with a cut-out).
If the dough is easy to work with, you can already transfer the circles on the parchment-lined cookie sheet. They only spread a tiny amount so they can be pretty close together. If it’s at all sticky, place the piece of parchment paper and the rolled-out dough onto a baking sheet and place in the fridge for about 20 minutes to firm up again, or place in the freezer for 5-10 minutes. Then transfer to the baking sheet.
Bake for 7-10 minutes or until the edges have very lightly browned.
Let cool for about 10 minutes on the cookie sheet, and then transfer the cookies to a cooling rack. Let cool completely, another 20-30 minutes. They can’t be warm at all or the powdered sugar will dissolve.
Roll out the rest of the dough from the first disc and bake the rest of those cookies. You’ll probably need to chill the dough since it’s been sitting out for a bit.
Then do the other disc of dough.