Preheat the oven to 350°F. Grease a 9x13 inch baking dish with a cooking spray
In a mixing bowl, mix together granulated sugar, all-purpose flour, baking soda, and salt. Then, add eggs and crushed pineapples with juice. Whisk until well combined.
Pour the batter into the prepared baking pan. Then, top with chopped pecans and light brown sugar. Bake in the preheated oven for 40-45 minutes or until ready. Check the readiness of the Granny Cake using a toothpick inserted in the center, if it comes out clean - the cake is ready.
While the Granny Cake is baking, prepare the topping. In a saucepan, mix together evaporated milk, granulated sugar, butter. Bring to a boil. Then, stir in flaked coconut and vanilla extract. Remove the Granny cake from the oven and spread the coconut topping evenly over the top. Switch the oven mode to broil. Broil the Granny cake until the coconut is toasted. Let it cool in the pan. Then, slice and enjoy!