Tarta de Cacao de Bioko
Background
Named for the island of Bioko off the coast of Central Africa, this cake celebrates a storied tradition of island-grown beans and Iberian home-baking techniques that traveled across seas and generations. The method is simple and precise, favoring a tender crumb, a balanced bittersweet profile, and a finish that highlights the origin story behind the name. With careful mixing and patient baking, you will achieve a smooth batter, an even rise, and a moist slice that suits everyday gatherings as well as special occasions.
Ingredients
- cocoa powder
- all-purpose flour
- sugar
- eggs
- unsalted butter
- whole milk
- baking powder
- salt
- vanilla extract
- powdered sugar (for dusting)
Equipment
- 20 cm round cake pan
- Parchment paper
- Mixing bowls, whisk, rubber spatula
- Hand mixer or stand mixer
- Fine-mesh sieve
- Oven and wire rack
- Kitchen scale or measuring cups
- Toothpick or cake tester
Preparation
- Pan prep: Lightly grease a 20 cm round cake pan with a thin film of unsalted butter, line the base with parchment, and dust the sides with a spoonful of cocoa powder to reduce sticking.
- Dry mix: Sift all-purpose flour, cocoa powder, baking powder, and a pinch of salt into a bowl, then whisk to combine evenly.
- Creaming: In a separate large bowl, beat softened unsalted butter with sugar until pale and fluffy, scraping the bowl as needed for an even texture.
- Emulsify: Add eggs one at a time, beating well after each addition until fully incorporated, then mix in vanilla extract.
- Batter: Add the dry mix to the creamed base in three additions, alternating with two additions of whole milk, beginning and ending with the dry mix. Stir gently just until smooth and no pockets of dry mix remain.
Bake and cool
- Preheat the oven to 175°C 350°F and allow it to stabilize for 10 minutes before baking.
- Scrape the batter into the prepared pan and smooth the top with a spatula, tapping the pan once or twice to release large air bubbles.
- Bake until the center springs back lightly and a tester shows a few moist crumbs, about 28 to 32 minutes, rotating the pan once if your oven heats unevenly.
- Cool on a rack for 10 minutes, then invert, remove parchment, and let the cake cool completely for 1 hour before slicing.
- Finish: Sift a light veil of powdered sugar over the top or add a gentle dusting of cocoa powder for a deeper hue.
How to enjoy
Serve at room temperature in modest slices to appreciate the delicate crumb and the layered bitterness and sweetness implied by the name. A small spoonful of unsweetened dairy or a simple fruit garnish complements the cake without overshadowing it. The texture holds beautifully when covered and kept at room temperature; refrigerate if your kitchen is warm, and allow the cake to come back to room temperature before serving for optimal tenderness.