Pineapple Rosemary Upside-Down Cake

Fresh rosemary in an upside-down cake sounds unexpected, but it works brilliantly. The piney, herbal aroma cuts through the sweetness of the caramelized pineapple and brown sugar, adding a sophisticated edge that turns a nostalgic dessert into something you’d see on a restaurant menu.

A full tablespoon of packed rosemary leaves goes directly into the creamed butter and sugar. This distributes the herb throughout the batter so every bite carries a subtle savory note rather than hitting you with a concentrated rosemary bomb. Sour cream in the batter adds tang and moisture, keeping the crumb exceptionally tender.

The topping follows the classic method: butter melted right in the baking pan, brown sugar spread over the top, then crushed pineapple layered on before the batter goes over everything. When you flip it out after cooling, the pineapple and caramelized sugar become a glossy, sticky crown with walnuts adding crunch from inside the cake.

Chef Tips

• Drain the pineapple thoroughly and reserve the juice. Excess liquid in the topping makes the cake soggy on the bottom (which becomes the top).
• Spread the batter gently over the pineapple layer. Aggressive spreading pushes the fruit around and creates bare spots.
• Cool for 10 to 15 minutes before inverting, not longer. The caramel sets as it cools, and waiting too long means it sticks to the pan permanently.
• Use fresh rosemary, not dried. Dried rosemary stays woody and prickly in the cake. Fresh leaves soften during baking.

Variations

• Thyme version: Replace rosemary with fresh thyme leaves for a milder, more floral herb flavor.
• Rum drizzle: Add a tablespoon of dark rum to the brown sugar topping before baking for a Caribbean twist.
• Ring style: Use pineapple rings instead of crushed for the traditional look with the rosemary twist.