01 - Preheat oven to 350°F. Grease a 9x13-inch baking pan thoroughly.
02 - In a large bowl, mix together flour, sugar, baking soda, and salt until well blended.
03 - Add eggs, vanilla extract, and the entire can of crushed pineapple with juice. Stir until just combined, being careful not to overmix.
04 - Gently fold in the chopped pecans and shredded coconut until evenly distributed throughout the batter.
05 - Pour batter into the prepared pan and spread evenly. Bake for 35-40 minutes or until a toothpick inserted in the center comes out clean.
06 - While cake bakes, combine sugar, butter, and evaporated milk in a saucepan. Bring to a gentle boil over medium heat, stirring constantly. Cook for 3-4 minutes until slightly thickened. Remove from heat and stir in vanilla extract.
07 - Immediately after removing cake from the oven, poke holes all over the surface with a fork or skewer. Pour the hot topping evenly over the hot cake.
08 - Allow the cake to cool completely before slicing. Serve at room temperature or warmed slightly.