Step 1

Preheat oven to 350°. Line a large rimmed baking sheet with parchment paper. Combine first 6 ingredients in the bowl of a stand mixer fitted with a paddle. Blend on low speed for 30 seconds. Meanwhile, in a separate bowl, whisk together eggs and next 5 ingredients. Add egg mixture to flour mixture; beat on low speed until combined, about 1 1/2 minutes. Fold in cherries and pistachios.

Step 2

Transfer dough to a lightly floured surface; divide in half. Using floured hands, shape each dough half into a 16"-long log. Brush off excess flour; transfer logs to prepared sheet, spaced 5" apart. Flatten each log into a 2"-wide strip. Bake, rotating sheet halfway through, until browned and set, about 30 minutes. Transfer to a rack; let cool for 15 minutes. Reduce oven to 250° and arrange 1 rack in top third of oven and 1 rack in bottom third.

Step 3

Line a second baking sheet with parchment paper. Transfer biscotti to a work surface. Using a serrated knife, cut each strip diagonally into 2/3"-thick slices. Arrange slices, cut side down, on baking sheets.

Step 4

Bake biscotti, rotating baking sheets halfway through, until crisp, about 40 minutes. Transfer baking sheets to racks; let cool. DO AHEAD Can be made 3 days ahead. Store in an airtight container at room temperature.