Orange Pineapple and Walnut Fruitcake

Name: Orange, Pineapple, and Walnut Fruitcake
Ingredients: 12 tbsp. butter, plus more for pan; 1 1⁄2 cups chopped candied pineapple; 2⁄3 cup dark rum; 1 1⁄2 cups flour, plus more for pan; 1 tsp. baking soda; 1⁄2 tsp. salt; 1 cup sugar; Zest of 2 oranges, plus ⅓ cup juice; 3 eggs; 1 tsp. vanilla extract; 1⁄2 cup roughly chopped walnuts; 1 1⁄2 cups confectioner’s sugar, sifted