Cupcakes
2 cups all-purpose flour
2 cups granulated sugar
2 teaspoons baking soda
2 eggs lightly beaten
1 can (20 ounces) crushed pineapple, with juice, undrained
1 cup sweetened, shredded coconut
1 cup walnuts, coarsely chopped, more to garnish

Frosting
1 cup (2 sticks) unsalted butter, softened
8 ounces cream cheese, softened
4 cups confectioners' sugar
2 teaspoons pineapple juice (from another small can of crushed pineapple)
2 Tablespoons crushed pineapple, chopped