Upside-Down Plum Cake

This Upside-Down Plum Cake is a beauty…. a showstopper….. AND, quite tasty as well. It is really quite easy, but looks like it was created in a Michelin stared establishment. At its core, an upside-down plum cake is beautifully straightforward. A layer of butter and sugar melts together at the base of the pan, creating the foundation for caramelization. Sliced plums are nestled into that mixture before a simple batter is poured over the top. As the cake bakes, everything transforms. The fruit softens, the sugar transforms into caramel, and the batter rises to become a tender crumb. Everything is infused with subtle fruit flavor. Once finished and flipped, you are rewarded with a beautiful cake with a glossy, jewel-toned top.

an upside-down Cake

The upside-down cake, often associated with pineapple in American kitchens, actually echoes a long French tradition of fruit-forward desserts where simplicity, seasonality, and technique shine. In France, you’ll find cousins to this cake in desserts such as the tarte Tatin, where apples caramelize beneath a buttery crust before being flipped into their final form. Restraint is what makes the French approach distinct. Rather than overwhelming the cake with spices or heavy sweetness, the goal is balance. A touch of vanilla and just enough sugar to highlight the natural character of the plums create a lovely, simple dessert. The best part about this wonderful summer cake is that a few humble ingredients create something so extraordinary.

Plums are particularly well-suited to this style of baking. Unlike more delicate fruits, they hold their structure under heat while releasing just enough juice to mingle with sugar and butter into a rich, almost jammy glaze. In Washington and Oregon, Italian prune plums are especially beloved. You might also find varieties like Shiro or Elephant Heart adding their own personality to the mix. Each brings a slightly different balance of sweetness and acidity, which is exactly what makes this cake so adaptable. My mom had dropped by some beautiful black plums, which I used for this particular cake. They added wonderful color and flavor to the final product.

The Perfect Base

For this plum cake, I have used a variation of a traditional French yogurt cake batter. This is the perfect cake for an upside-down cake because it is a sturdy, yet moist, cake and can stand up to the fruit on top. It has a lovely, subtle flavor that allows the plums to shine. A Poached Pear Cake is another beautiful and delicious cake that uses a French yogurt cake as a base.

When it comes time to flip the cake, there’s always a moment of anticipation….Will it stick or release??? You invert it while still warm, letting gravity do its work. If you’ve generously greased the pan and used parchment paper, the pan will lift away with no issues. A glossy mosaic of plums, their edges slightly caramelized, their centers soft and luminous is revealed. The presentation feels almost too beautiful for something so easy to make.

Serving ideas

For serving, it pairs just as well with a cup of strong coffee on a misty morning as it does with a glass of late-harvest wine on a cool evening. Keeping it simple by topping with a dollop of lightly sweetened whipped cream, or a scoop of simple vanilla ice cream, would be perfect.

This Upside-Down Plum Cake demonstrates that good cooking doesn’t have to be complicated. With a handful of simple ingredients, a nod to what is in season, and a willingness to let the process unfold, you can create something that feels timeless.