
Pre-heat oven to 350F (180C). Grease and flour a 9 x 5 inch (22 x 14 cm) loaf pan.
In a medium bowl whisk together the flour, baking powder, baking soda and salt, set aside.
In the bowl of the mixer beat the eggs, yolk and sugar until light and fluffy about 3-4 minutes (on low speed or #2). Add the butter and beat to combine, then add the yogurt, oil, milk, vanilla and zest, beat to combine. Add the flour mixture and beat until smooth.
Pour into the prepared loaf pan and bake for approximately 50-60 minutes or until a tooth pick comes out clean. Let cool completely before drizzling with the mandarin orange glaze or dusting with powdered sugar.
In a medium bowl whisk together until smooth the icing sugar, juice, milk or cream and zest. Add more or less cream depending on desired thickness.