Ingredient:

• 1 package yellow cake mix (regular size)
• 1/2 cup quick-cooking oats
• 2 to 2-1/2 teaspoons pumpkin pie spice
• 1 can (15 ounces) solid-pack pumpkin
• 1 large egg, room temperature
• 2 tablespoons canola oil
• 3 cups confectioners' sugar
• 1 teaspoon grated orange zest
• 3 to 4 tablespoons orange juice