Chocolate-Dipped Spritz Washboards with Pistachios

"Although the origins of spritz cookies are fuzzy—some say they come from Scandinavia, while others cite Germany—I'm inclined to believe it's the latter, because spritzen means to squirt in German, which is how these cookies are formed: The dough is squirted from a cookie press. You can make any shape you want, but we love these old-fashioned washboard strips. If the idea of yet another piece of kitchen equipment deters you, rest assured these cookies are so delicious, you'll be baking them more than once a year. A cookie press is not expensive and with all the different shapes you can make from the dough, it will more than pay for itself in fun and entertainment over the years for the child in all of us...."