Chocolate Sourdough Bread

Name: Chocolate Sourdough Bread
Prep time: 30 min
Cook time: 40 min
Total time: 1 h 10 min
Cuisine: European
Ingredients: 30 g sourdough starter; 60 g all-purpose flour; 60 g water; 45 g unsweetened cocoa powder; 100 g just boiled water; 280 g cold water; 460 g all-purpose flour (with protein of at least 11%); 50 g granulated sugar; 8 g salt; 1 tsp vanilla extract; All the levain (around 120g active starter); 115 g dark chocolate chips