Prune Cake (Holiday Spice Cake)

This is a cake that rewards patience. Bake it, soak it in a hot buttermilk-butter sauce, wrap it tight, and walk away for three full days. When you finally slice it, the spices have deepened, the prunes have turned jammy, and every crumb is saturated with sticky, caramelized sweetness.

The buttermilk works double duty here: it goes in the cake batter for tang and tenderness, and again in the sauce that soaks the finished cake. Combined with oil instead of butter in the batter, it creates an exceptionally moist crumb that stays soft even after days of sitting.

Chopped prunes and pecans give the cake heft and texture, while cinnamon, nutmeg, allspice, and both vanilla and lemon extract build a spice profile that’s warm without being one-note. The boiled sauce is cooked until it spins a thread off a spoon, which means it’s hit the soft-ball candy stage and will set into a glossy, sticky glaze as it soaks into the cake.

Pro Tips

• Poke holes all over the cooled cake with a skewer before pouring the sauce. The more holes, the deeper the sauce penetrates.
• Pour the sauce slowly, letting each addition absorb before adding more. Dumping it all at once runs off the sides.
• The sauce recipe makes enough for two cakes. Make a double batch of cake or freeze the extra sauce for next time.
• Wrap the soaked cake tightly in plastic wrap, then foil. Air is the enemy during the three-day cure.

Variations

• Date cake: Replace the prunes with chopped dates for a sweeter, more caramel-like flavor.
• Bourbon soak: Add 2 tablespoons of bourbon to the sauce for a boozy holiday version.
• Walnut swap: Use walnuts instead of pecans for a more assertive, slightly bitter nut flavor.