Totoro Steamed Buns (Chocolate Filled!)

Name: Totoro Steamed Buns (Chocolate Filled!)
Prep time: 30 min
Cook time: 20 min
Total time: 50 min
Cuisine: Asian
Ingredients: 1/2 cup coconut cream; 1 cup dark chocolate chips ((or chopped chocolate)); optional: 2 tbsp hazelnut butter and 1/2 tsp vanilla extract; 1 tbsp black sesame seeds (soaked for at least 1 hour); 1/2 cup water; 1/2 cup bao flour; 1 tbsp sugar; 1/2 tsp oil; 1/4 tsp dry yeast; 1 cup bao flour; 2 tbsp sugar; 1 tsp oil; 1/2 tsp dry yeast; 1/3 cup warm water; About 1 tbsp melted chocolate (for decorating)