Cinnamon Sheet Cake with Cider Frosting

Ingredients

• Cinnamon Sheet Cake
• ½ cup (110g) vegetable oil, or other neutral oil
• 1 cup (198g) granulated sugar
• ½ cup (106g) light brown sugar
• 4 tablespoons (57g) unsalted butter, melted
• 3 large (170g) eggs
• 1 tablespoon pure vanilla extract
• 2½ cups (301g) all-purpose flour
• 1 tablespoon ground cinnamon
• 1 teaspoon baking powder
• ½ teaspoon baking soda
• ½ teaspoon salt
• ½ cup (120g) buttermilk
• Cider Frosting
• 1½ sticks (170g) unsalted butter
• 3 cups (340g) confectioners’ sugar
• 1 teaspoon pure vanilla extract
• Pinch of ground cinnamon
• Pinch of fine sea salt
• ¼ cup boiled cider (to make your own, see the footnote)