Preheat oven to 425F and prepare a 12-muffin pan with muffin liners.
Using a cheese grater or shredder, shred two zucchini until you have 1 ¾ cups of shredded zucchini. Set aside (no need to blot).
In a medium, combine flour, baking powder, baking soda, salt, nutmeg, cinnamon, and cardamom. Set aside.
In a separate mixing bowl, whisk together your sourdough discard, oil, sugars, eggs and vanilla extract.
Add the dry ingredients to the bowl of wet ingredients and stir until fully combined.
Stir in the shredded zucchini and whatever add-ins you like.
Evenly distribute the batter in the 12-muffin pan. Place in the oven and bake at 425F for 5 minutes, then turn the temperature down to 350F and bake for another 15 minutes or until the tops of the muffins are round and set.
Notes
Optional: 1 cup semi-sweet chocolate chips (or chopped walnuts)
Optional: Sprinkle extra sugar on top
Storage: Store at room temp for up to 3 days and in the fridge for up to 7 days. Freeze for up to 6 months.
If you don't have cardamom and/or nutmeg feel free to omit them and stick with cinnamon or replace them with another cozy spice such as pumpkin pie or chai spice mixes.