In a mixing bowl, add the active starter, warm water, warm milk, cocoa powder, molasses, honey, avocado oil, egg, vanilla, and cinnamon and whisk until generally combined.
¾ (200g) cup active sourdough starter, ½ (120g) cup whole milk, ⅓ (90g) cup warm water, 3 (60g) tablespoons unsulphured molasses, 3 (60g) tablespoons honey, 1 large egg, ¼ (55g) cup avocado oil, ½ teaspoon vanilla extract, 2 (13g) tablespoons unsweetened cocoa powder, ¼ teaspoon cinnamon
Sourdough Discard Option: If you want to make this recipe with sourdough discard and yeast, add the discard and yeast to the wet ingredients above and whisk in.
3/4 (200g) cup sourdough discard, 2 (6g) tsp instant yeast
Once the wet ingredients are combined, add the all-purpose flour, whole wheat flour, and salt to the bowl.
3¼ (400g) cups all-purpose flour, ¾ (100g) cup whole wheat flour, 2 (10g) teaspoons fine sea salt
Mixing by hand: If you're mixing this dough by hand, mix and knead the dough together until it's a smooth ball. This should take about 6-8 minutes.
Mixing with a stand mixer: If you're using a stand mixer, knead the dough on the lowest setting Speed 1-2 for 8-10 minutes, scraping the bowl halfway through to make sure everything is incorporated.
Once the dough is mixed, grease a bowl or container large enough for the dough to double with cooking spray and transfer the dough to the container. Cover the dough with plastic or a lint-free towel, and allow the dough to rest 30 minutes.