Chocolate Chai Sourdough Loaf Cake

Preheat the oven to 180C (350F) and grease a loaf pan.
In a small bowl, melt the chocolate and water together, stirring until it's smooth (you can do this in the microwave). Set aside to cool slightly.
In a large mixing bowl, add the softened butter and brown sugar and whisk together before adding the eggs, vanilla extract, yogurt and sourdough starter. Whisk together to form a smooth batter.
I find doing this with a whisk is fine. You can use an electric hand mixer or stand mixer, but I find a whisk is less washing up!
Now add the chocolate mixture and whisk until well combined.
Add the chai tea latte mix, salt and baking powder to the all purpose flour and mix together.
Then add the flour mix on top of the liquid batter and gently fold into each other until well combined.
Pour the mixture into the prepared loaf pan and bake at 180C (350F) for around 50 minutes. You can test the middle by inserting a skewer or toothpick to check for doneness.
Remove the sourdough chocolate chai loaf cake from the oven and allow it to cool in the tin for around 10 minutes before inverting it onto a wire rack to fully cool.
When you want to frost the sourdough chocolate chai quick bread, you'll need to add all the frosting ingredients to the bowl of a food processor or stand mixer and beat until light and fluffy.
Spread frosting over cooled loaf cake and sprinkle with chopped dark chocolate if desired.