'1/2 cup unsalted butter or margarine'
'1 1/2 cups all-purpose flour'
'2 tablespoons grated orange zest'
'2 large eggs'
'2 1/2 cups all-purpose flour'
'3 teaspoons active dry yeast'
'1 cup whole milk'
'30 grams semisweet chocolate, finely chopped'
'1 tablespoon instant coffee powder'
'1/4 teaspoon baking soda'
'2 tablespoons freshly squeezed orange juice'
'1/2 cup unsalted butter or margarine'
'1 1/2 cups all-purpose flour'
'2 tablespoons grated orange zest'
'2 large eggs'
'2 1/2 cups all-purpose flour'
'3 teaspoons active dry yeast'
'1 cup whole milk'
'30 grams semisweet chocolate, finely chopped'
'1 tablespoon instant coffee powder'
'1/4 teaspoon baking soda'
'2 tablespoons freshly squeezed orange juice'
'Grease two 20cm round cake pans and dust with flour.'
'Cream the butter or margarine until light and fluffy
Add the sour orange, eggs, and coffee powder, beating well after each addition.'
'Sift the flour with yeast and add to the creamed mixture, alternating with milk, beginning and ending with the flour mixture.'
'Pour 2/3 of the batter into prepared pans.'
'Mix together the chocolate, instant coffee powder, and baking soda
Add orange juice and stir until well combined.'
'Spoon the mixture onto the batter in a pan, mixing gently to combine
Repeat with remaining batter.'
'Bake at 170°C (moderate) for 20-25 minutes or until a toothpick inserted comes out clean.'
'Let cool completely before glazing and serving
Cut into 10-12 slices.'
'Fill and cover with one of the following recipes.'