01 - Preheat the oven to 350°F. Grease a 9x13-inch baking pan thoroughly.
02 - In a large bowl, whisk together flour, sugar, baking soda, and salt until well blended.
03 - Add eggs, vanilla extract, and the entire can of crushed pineapple including juice. Stir until just combined, being careful not to overmix.
04 - Gently fold in chopped pecans and shredded coconut until evenly distributed throughout the batter.
05 - Pour batter into prepared pan and spread evenly. Bake for 35-40 minutes 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 3-4 minutes until slightly thickened. Remove from heat and stir in vanilla extract.
07 - Immediately after removing cake from oven, poke holes all over the surface with a fork or skewer. Pour hot topping evenly over hot cake. Allow to cool completely before slicing and serving.