Wash your orange and dry very well. Zest the orange into the bowl for your cookie dough. Add the white sugar to the bowl, and rub the orange zest and white sugar together with your fingers until combined and fragrant. This step helps bring out the oil in the orange peel giving the biscotti a more elevated citrus flavor.
1 orange, zested, 1 (200g) cup granulated white sugar
Add the eggs, sourdough discard, melted butter, vanilla, and orange extract (if using) to the bowl and whisk to combine.
1/2 tsp orange extract, 2 large eggs, ½ (120g) cup sourdough discard, ⅓ (75g) cup unsalted butter, melted, 1 ½ teaspoons vanilla extract
In a separate bowl, whisk together the flour, baking powder, salt, and cinnamon.
2 ½ (300g) cups all-purpose flour, 1 teaspoon baking powder, ¼ teaspoon fine sea salt, ⅛ teaspoon ground cinnamon
Chop your cranberries to the desired pieces you want (I just roughly chopped them), and add to the dry ingredients. Mix the cranberries into the dry ingredients to coat.
¾ (100g) cup dried cranberries, chopped
Add the dry ingredients to the wet, and mix with a stand mixer or hand held beaters on low. This is a stiff cookie dough, but it will come together! Don't overmix at this stage or the cookies will be tough. If the dough is very crumbly, add 1 Tablespoon of orange juice to help bring it together.
1 tablespoon orange juice
Once the dough has come together, cover the bowl with plastic and chill for 30 minutes to make shaping easier.