Carrot Cake With Lemon Icing with orange

1 1/4 cups room temperature unsalted butter 2 cups light brown sugar 5 large eggs , separated 1 orange, juice and zest of 1 teaspoon baking powder 1 teaspoon[...]

2 1/4 cups flour 1 1/2 teaspoons baking soda 1 teaspoon salt 1 teaspoon ground cinnamon 1/2 teaspoon ground ginger 1 1/2 cups sugar 3 large eggs 2/3 cup[...]