1️⃣ Prepare the Cake:
Preheat the oven to 350°F (175°C) and grease or spray a 13×9-inch baking dish.
In a large bowl, mix the flour, sugar, baking soda, eggs, vanilla extract, and crushed pineapple (with juice) until well combined.

2️⃣ Bake the Cake:
Pour the batter into the prepared baking pan and bake for 40-45 minutes, or until golden brown. A toothpick should come out clean when inserted into the center.

3️⃣ Make the Topping:
While the cake is baking, make the topping by heating butter, evaporated milk, vanilla extract, and sugar in a saucepan over medium-high heat. Bring to a boil and stir frequently.

4️⃣ Add Nuts and Coconut:
Stir in the chopped pecans or walnuts and coconut flakes. Continue cooking on medium heat for about 5 minutes, stirring constantly. The mixture will thicken slightly.

5️⃣ Assemble the Cake:
Once the cake is done, remove it from the oven and poke holes all over the top with a fork or skewer. Pour the warm topping evenly over the cake, making sure to fill the holes.

6️⃣ Cool and Serve:
Let the cake cool before serving to allow the flavors to set.