A rich and moist chocolate loaf cake made with sourdough discard and flavored with sweet, aromatic chai tea mix. Topped with a creamy chai buttercream frosting and finished with dark chocolate shavings, this cozy loaf is perfect for brunch, dessert, or an afternoon treat.
Preheat the oven to 350°F (175°C). Line a 9x5-inch loaf pan with parchment paper and lightly grease it.
In a large bowl, whisk together the flour, cocoa powder, baking soda, baking powder, salt, and powdered chai tea mix.
In another bowl, whisk the sourdough discard, vegetable oil, brown sugar, granulated sugar, eggs, milk, and vanilla extract until smooth.
Gradually fold the dry ingredients into the wet ingredients until just combined. Do not overmix.
Pour the batter into the prepared loaf pan and smooth the top evenly.
Bake for 50-60 minutes, or until a toothpick inserted in the center comes out clean. Allow the loaf to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before frosting.
Beat the softened butter until creamy. Gradually add powdered sugar and powdered chai tea mix. Add milk one tablespoon at a time until the frosting becomes smooth and spreadable.
Spread the frosting evenly over the cooled loaf using a spatula.
Sprinkle dark chocolate shavings over the top. Slice and serve.