Heat oven to 350 degrees. Grease and flour 12-cup Bundt cake pan. Prepare cake mix as directed on package except - decrease water to 1 cup and add marmalade and orange peel. Bake until cake pulls away from side of pan and springs back when touched lightly in center or when wooden pick inserted in center comes out clean, 45 to 50 minutes. Cool 10 minutes; remove from pan and cool completely. Spread with glaze, allowing some to drizzle down side. Garnish with mint leaves and orange peel if desired.

Blend 3/4 cup powdered sugar, 1 teaspoon grated orange peel and 2 teaspoons orange juice until smooth. If necessary, stir in additional orange juice, 1/4 teaspoon at a time, until of desired consistency.