Baking the cookies in the second round at a low temperature creates that extra crisp texture classic to biscotti. If you aren’t quite sure your cookies are done, bake them for an extra minute or two. The bottoms may get a little darker brown in color, but at the low oven temperature, they shouldn’t burn very easily.
Not a huge fan of almonds or want to mix up the flavors? You can substitute the almond extract for vanilla extract or a more traditional anise flavoring. Swap the slivered almond for chopped pistachios, hazelnuts, or pecans, or leave the nuts out altogether.
For that classic oblong shape, cut the slices at a 45 degree angle across each log.