1️⃣ Preheat the oven to 325°F (163°C). Grease and flour a 9-inch Bundt cake pan, or use nonstick baking spray with flour.

2️⃣ In a medium bowl, combine the flour and baking powder. Set aside.

3️⃣ Cream together the butter, shortening, and sugar in a large mixing bowl until light and fluffy.

4️⃣ Add the eggs one at a time, beating after each addition. Avoid overbeating.

5️⃣ Gradually add the flour mixture and buttermilk, alternating between the two. Mix until just combined.

6️⃣ Stir in the crushed pineapple and vanilla extract until evenly distributed.

7️⃣ Pour the batter into the prepared Bundt pan and bake for 75-85 minutes or until a toothpick inserted into the center comes out with a few moist crumbs.

8️⃣ Let the cake cool in the pan for 30 minutes before transferring it to a wire rack to cool completely.

9️⃣ For the glaze, whisk together the melted butter, powdered sugar, vanilla, and reserved pineapple juice until smooth.

🔟 Drizzle the glaze over the cooled cake before serving.