1. 1. Prepare Your Oven and Muffin Tin: Start by preheating your oven to 375 F (190 C). Line a 12-cup muffin tin with paper liners or grease it thoroughly. This prevents sticking and makes for easy cleanup.

2. 2. Combine Dry Ingredients: In a large mixing bowl, whisk together the all-purpose flour, baking soda, ground cinnamon, ground nutmeg, ground ginger, ground cloves (if using), and salt. Make sure there are no lumps and the spices are evenly distributed. This ensures consistent flavor in every bite.

3. 3. Mix Wet Ingredients: In a separate medium bowl, whisk together the sourdough discard, pumpkin puree, granulated sugar, light brown sugar, vegetable oil (or melted butter), large egg, and vanilla extract until well combined and smooth. The mixture should be a uniform orange color.

4. 4. Combine Wet and Dry Mixtures: Pour the wet ingredients into the bowl with the dry ingredients. Stir gently with a spatula or wooden spoon until just combined. Be careful not to overmix; a few lumps are perfectly fine. Overmixing can lead to tough muffins. If adding chocolate chips or nuts, fold them in now.

5. 5. Fill Muffin Cups: Divide the batter evenly among the 12 prepared muffin cups. You can use an ice cream scoop for easy and consistent portioning. Fill each cup about two-thirds full.

6. 6. Bake Until Golden: Place the muffin tin in the preheated oven and bake for 20-25 minutes, or until a wooden skewer or toothpick inserted into the center of a muffin comes out clean. The tops should be golden brown and spring back lightly when touched.

7. 7. Cool and Enjoy: Once baked, remove the muffin tin from the oven and let the muffins cool in the tin for 5 minutes. Then, transfer them to a wire rack to cool completely. This prevents the bottoms from becoming soggy.