300g 72% cocoa bittersweet chocolate (I used a 90g bar of 65% chocolate and 210g semisweet chocolate chips)
226g unsalted butter (1 cup) (I used salted butter so I cut the salt to ½ tsp)
200g sugar
1 tsp salt (less if using salted butter)
2 tsp vanilla
1 tbsp honey (optional)
3 eggs, room temp
30g dark cocoa powder
10g malted milk powder
pinch of cinnamon
220g mature sourdough starter 100% hydration (I used unfed starter with hooch, straight from the fridge)