'1 2/3 cups all-purpose flour, sifted'
'1/4 teaspoon active dry yeast'
'1/4 teaspoon baking soda'
'1/4 teaspoon salt'
'1/2 cup unsalted butter, softened'
'1 cup granulated sugar'
'1 large egg and 1 large egg yolk'
'1 cup freshly squeezed tangerine juice'
'2/3 cup semisweet chocolate chips'
'1 2/3 cups all-purpose flour, sifted'
'1/4 teaspoon active dry yeast'
'1/4 teaspoon baking soda'
'1/4 teaspoon salt'
'1/2 cup unsalted butter, softened'
'1 cup granulated sugar'
'1 large egg and 1 large egg yolk'
'1 cup freshly squeezed tangerine juice'
'2/3 cup semisweet chocolate chips'
'Preheat the oven to a low temperature.'
'Grease a tube pan in the middle with butter and dust with all-purpose flour.'
'Cream together the butter, sugar, egg, and egg yolk in a small bowl.'
'Gradually add half of the tangerine juice, flour, yeast, baking soda, and salt while continuously beating.'
'Once the mixture is well combined, divide it into two portions and place one portion in the prepared pan.'
'Add the remaining chocolate chips to the remaining batter and gradually add more tangerine juice.'
'Stop adding juice when the chocolate mixture has a similar consistency to the tangerine mixture.'
'Spread the chocolate mixture over the top of the tangerine mixture in the pan.'
'Mix the two mixtures together with a spatula, creating a swirly pattern.'
'The tangerine mixture will blend unevenly with the chocolate, producing a marbled effect.'
'Bake for approximately 45 minutes.'
