When preparing the pineapple frosting, make sure the butter is at room temperature for easy mixing. If the frosting seems too thick, you can add a tablespoon of milk to achieve the desired consistency. Likewise, if the frosting is too thin, you can add more powdered sugar to thicken it up.

Variations and Substitutions
If you want to put a twist on this classic pineapple cake, you can try some creative variations. One option is to add a layer of sliced bananas between the cake layers for a tropical twist. Alternatively, you can incorporate chopped macadamia nuts into the cake batter for added crunch.

If you have dietary restrictions or preferences, you can easily make substitutions in this recipe. For a dairy-free version, you can replace the butter with coconut oil and use almond milk instead of buttermilk. To make the cake gluten-free, simply use a gluten-free all-purpose flour blend in place of regular flour.