Dorie Greenspan's Rugelach
I've made rugelach countless times, but nowadays my dough is even more foolproof because I make it in a food processor. I've also made a few other changes to the recipe. While my mother-in-law's rugelach were filled with cinnamon-sugared nuts, mine also include a slick of jam, some currants, and a handful of chopped chocolate.
Make the dough
Let the cream cheese and butter rest on the counter for 10 minutes—you want them to be slightly softened but still cool. Put the flour and salt in a food processor, scatter over the chunks of cream cheese and butter, and pulse the machine 6 to 10 times. Then process, scraping down the sides of the bowl often, just until the dough forms large curds—don't work it so long that it forms a ball on the blade.
Turn the dough out, gather it into a ball, and divide it in half. Shape each half into a disk, wrap the disks in plastic wrap, and refrigerate for at least 2 hours, or up to 1 day.
Make the filling
Heat the jam in a saucepan over low heat, or do this in a microwave, until it liquefies. Mix the sugar and cinnamon together. Line two baking sheets with parchment or silicone mats. (Silicone baking mats are great for rugelach.)
Make the cookies
Pull one packet of dough from the refrigerator. If it is too firm to roll easily, either leave it on the counter for about 10 minutes or give it a few bashes with your rolling pin.
On a lightly floured surface, roll the dough into an 11-to-12-inch circle. Spoon (or brush) a thin gloss of jam over the dough and sprinkle with half of the cinnamon sugar. Scatter half of the nuts, half of the currants, and half of the chopped chocolate over the dough. Cover the filling with a piece of wax paper and gently press the filling into the dough, then remove the paper and save it for the next batch.
Using a pizza wheel or a sharp knife, cut the dough into 16 wedges, or triangles. (The easiest way to do this is to cut the dough into quarters, then to cut each quarter into 4 triangles.) Starting at the base of each triangle, roll the dough up so that each cookie becomes a little crescent. Arrange the roll-ups on one baking sheet, making sure the points are tucked under the cookies and refrigerate.
Repeat with the second packet of dough, and refrigerate the cookies for at least 30 minutes before baking.
Position the racks to divide the oven into thirds and preheat the oven to 350°F (175°C).
Make the glaze
Stir the egg and water together, and brush a bit of this glaze over each rugelach. Sprinkle the cookies with sugar.
Bake the cookies for 20 to 25 minutes, rotating the sheets from top to bottom and front to back at the midway point, until they are puffed and golden. Move the cookies to racks to cool to just warm or to room temperature.