Pioneer-Style Orange Cake

INGREDIENTS

• 3/4 cups sugar
• 1/2 cup sour cream
• 1 tablespoon fresh orange juice
• 1/4 teaspoon salt
• 1 teaspoon baking powder
• 1 1/2 cup all-purpose flour
• 8 ounces cream cheese, softened
• 1 cup confectioners sugar
• 1/2 teaspoon baking soda
• 1/2 cup unsalted butter, very soft
• 1/4 cup freshly squeezed orange juice
• 1/3 cup sour cream
• 4 tablespoons unsalted butter, softened
• 1 teaspoon vanilla
• 2 eggs
• 2 teaspoons orange zest