Ingredients

  • 2 cups unbleached all purpose flour
  • 2 teaspoons baking soda
  • 2 teaspoons baking powder
  • 2 teaspoons ground cinnamon
  • 1/2 teaspoon salt
  • 4 large eggs
  • 3/4 cup vegetable oil
  • 3/4 cup sugar
  • 2/3 cup packed golden brown sugar
  • 1/2 cup orange marmalade
  • 1/2 cup orange juice
  • 3 cups (lightly packed) grated peeled carrots
  • 3/4 cup chopped toasted walnuts
  • 4 8-ounce packages cream cheese, room temperature
  • 2 cups powdered sugar
  • 1 1/4 cups (about) orange marmalade
  • 6 tablespoons (3/4 stick) unsalted butter, room temperature
  • 2 teaspoons grated orange peel
  • 1 1/4 cups finely chopped toasted walnuts (about 6 ounces)

Method

  • Preheat oven to 350F.
  • Butter and flour two 9-inch-diameter cake pans with 2-inch-high sides.
  • Sift first 5 ingredients into medium bowl.
  • Beat eggs, oil, sugars, marmalade and juice in large bowl until blended.
  • Stir in dry ingredients.
  • Fold in carrots and nuts.
  • Divide batter between cake pans.
  • Bake until tester inserted into centers comes out clean, about 40 minutes.
  • Transfer cakes to racks; cool 15 minutes.
  • Turn out cakes onto racks; cool completely.
  • Using electric mixer, beat cream cheese and sugar in large bowl until smooth.
  • Add 3/4 cup marmalade, butter and orange peel and beat just until smooth.
  • If necessary, cover and chill until firm enough to spread.
  • Place 1 cake on plate.
  • Spread with 1/4 cup marmalade.
  • Spread 1 cup frosting over.
  • Top with second cake.
  • Spoon 2 cups frosting into pastry bag fitted with large star tip.
  • Spread remaining frosting smoothly over top and sides of cake.
  • Pipe frosting in 4 parallel lines atop cake, spacing evenly.
  • Pipe 5 lines atop cake in opposite direction, forming lattice.
  • Press 1 cup nuts onto sides of cake.
  • Pipe ring of frosting around top edge of cake.
  • Stir 1/4 cup marmalade to loosen; spoon some into 1 row of lattice diamonds.
  • Spoon some of remaining nuts into next row of diamonds.
  • Repeat, alternating marmalade and nuts, filling rows completely.
  • (Can be made 2 days ahead.
  • Cover with cake dome and chill.)