The Bon Appétit Test Kitchen has formulated a single-bowl chocolate olive oil cake designed to outperform traditional butter recipes by using extra-virgin olive oil to lock in long-lasting moisture and introduce complex floral notes.

The Culinary Science Behind Olive Oil in Baking

Using oil proves superior to butter when constructing this specific crumb structure. Extra-virgin olive oil yields an exceptionally tender texture and keeps the cake moist for days. Beyond moisture retention, the oil adds subtle grassy and peppery notes that complement both melted chocolate and cocoa powder. A standard extra-virgin olive oil—nothing overly expensive—delivers the best flavor balance.

Effortless Preparation and Decadent Frosting

The batter requires minimal equipment, coming together entirely with a hand whisk without electric mixers or traditional butter-creaming steps. Once baked, the cake is finished with a generous swoosh of olive-oil-infused ganache frosting. This topping sets into a glossy, soft, fudgy coating topped with flaky sea salt, making it suitable as a casual snack, a dinner party dessert, or a make-ahead recipe that tastes even better the following day.

Critical Ingredient Choice: Dutch-Process Cocoa

The formulation relies specifically on Dutch-process cocoa powder due to its lower acidity compared to natural cocoa powder. Substituting natural cocoa alters the chemical reaction with the baking soda leavener, resulting in a noticeably denser cake. The recommended standard for this recipe is Guittard Cocoa Rouge Unsweetened Dutch-Process Cocoa Powder.

Troubleshooting and Storage Guidelines

Managing Extra Frosting

The recipe yields a generous volume of ganache intended for dramatic swoops, though a thinner layer can be applied based on preference. Excess frosting can be frozen for up to three months. To reuse, thaw overnight in the refrigerator and whisk to re-emulsify.

Fixing Oily or Separated Frosting

The frosting mixture may look broken or oily prior to incorporating the powdered sugar. Once fully combined, the mixture smooths into a cohesive, glossy finish. If the frosting does not set within 20 minutes, extend the chilling time and stir occasionally; warmer kitchen environments require additional time to reach a spreadable, fudge-like consistency.

Make-Ahead Preparation

This cake keeps extremely well over time as its flavor deepens. Bake it one day in advance and store it under a cake dome at room temperature for optimal taste and texture.