Preheat the Oven: Start by preheating your oven to 350°F (175°C). Greasing and flouring your cake pan will help ensure an easy release when it's time to serve.
Mix Wet Ingredients: In a large bowl, cream together the softened butter and sugar until the mixture appears light and fluffy.
Add Eggs and Vanilla: Beat in the eggs one at a time, making sure each one is well incorporated. Then, stir in the vanilla extract.
Combine Dry Ingredients: In another bowl, mix together the flour, baking soda, and salt until evenly combined.
Blend Together: Gradually add the dry ingredients to the wet mixture, mixing until just combined.
Add Pineapple: Gently fold in the undrained pineapple to the batter until it is evenly distributed.
Bake: Pour the batter into the prepared cake pan and smooth the top. Bake for 30-35 minutes, or until a toothpick inserted in the center comes out clean.
Cool and Serve: Allow the cake to cool in the pan for about 10 minutes before transferring it to a cooling rack. Once cool, slice and enjoy!