Preheat oven to 350-degrees. Prepare large baking sheet by lining with parchment paper. I find that parchment paper cooks better.
Whisk together flour, cocoa powder, baking soda, and salt.
Using your electric mixer beat the butter and sugar until fluffy. Add eggs and vanilla extract, beat the mixture until combined well.
Stir in flour mixture to form a stiff dough. Next, mix in the chocolate chips. You can use your hands if you're having a tough time mixing it in since the dough is stiff.
With this step, it depends on how you roll out your dough. You can either roll it out and decide not to divide the dough (which is what I do when I'm lazy)Or you can divide the dough in half and flour your hands. Form the dough into two flat logs on the baking sheet. Around 12 inches long and 4-6 inches wide. About two inches thick as well. Sprinkle with powdered sugar. You can either cut your biscotti before you pop it in the oven or after. I switch between before and after. You choose!
Bake 30-35 minutes. Check on it at the 30 minute mark. Cool on your baking sheet for 5 minutes.
Transfer the biscotti to the cutting board and cut diagonally into even slices Arrange your biscotti on a baking sheet and bake for an additional 10 minutes, or until crisp. Cool on your rack when done. Sometimes it has to sit out for a bit on the cooling wrack to crisp up. Enjoy!
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Notes
Recipe can be stored for about a week in a ziploc bag or container.
Keyword biscotti, cookies, cookies recipes, holiday cookies