Step 1

Preheat the oven to 350 degrees.

Step 2

Grease and flour a 9x13 baking dish.

Step 3

In a large bowl, whisk together flour, sugar, and baking soda.

Step 4

Mix in vanilla extract, crushed pineapple, and eggs until combined.

Step 5

Pour into prepared baking dish and bake for 25 to 30 minutes or until an inserted toothpick comes out clean.

Step 6

Let cool completely.

Step 7

Whisk pineapple and pudding mix together until combined.

Step 8

Gently fold in the Cool Whip or whipped cream until incorporated.

Step 9

Spread on cooled cake.

Step 10

Refrigerate for at least 30 minutes before serving.