Preheat oven to 350°F (175°C). Line a baking sheet with parchment like the domestic goddess you are.
In a large bowl, combine flour, baking powder, salt, and sugar. Stir like you mean it.
In a separate bowl, whisk coffee, oil, and vanilla.
Add wet ingredients into dry and mix until a dough forms.
Fold in chopped chocolate and optional espresso powder like you're folding secrets into a diary.
Shape the dough into a log (about 10 inches long, 3 inches wide) on the baking sheet.
Bake for 35 minutes. Let it cool for 10 minutes before cutting—yes, patience.
Slice the log diagonally into ½-inch thick pieces.
Lay each biscotti flat on the baking sheet.
Bake for 15 more minutes, flipping halfway through if you're feeling extra.
Cool on a rack until crisp and ready to slay.