Preheat the oven to 350°F (175°C). Grease and flour a 9-inch round cake pan.

In a mixing bowl, combine flour, sugar, baking soda, and salt.

In another bowl, mix the crushed pineapple, vegetable oil, eggs, and vanilla extract.

Add the wet ingredients to the dry ingredients and mix until just combined.

Pour the batter into the prepared cake pan and smooth the top.

Bake for 30 minutes or until a toothpick inserted into the center comes out clean.

Allow the cake to cool in the pan for 10 minutes before transferring to a wire rack to cool completely.

In a mixing bowl, beat the softened cream cheese and butter until smooth.

Gradually add the powdered sugar and vanilla extract, mixing until well combined.

Once the cake is completely cool, spread the frosting evenly over the top.