This mini flourless chocolate cake is a rich, fudgy, and deeply chocolatey dessert that's naturally gluten-free. It bakes into a soft, slightly cracked cake with an irresistibly smooth texture.
Preheat the Oven: Preheat the oven to 350°F (177°C). Lightly butter a 5x7-inch, 5x5-inch, or 4x6-inch baking dish and set it aside.
Melt the Chocolate: In a heatproof bowl set over a pot of simmering water (double boiler method), melt the chocolate, butter, and oil, stirring often until smooth. Remove from heat and let cool.
Mix the Batter: In a small bowl, whisk together the egg, cocoa powder, vanilla, and salt. Gradually whisk this mixture into the cooled melted chocolate.
Beat the Egg White: In another small bowl, beat the egg white and sugar until stiff peaks form.Note: Stiff peaks stand upright when you lift the beater, without collapsing.
Fold in the Egg White: Gently fold the beaten egg white into the chocolate mixture until just combined.
Pour & Prep for Baking: Pour the batter into the prepared baking dish and sprinkle ¼ teaspoon of sugar on top. Place the dish on a rimmed baking sheet.
Bake: Bake for 25-30 minutes.Note: The cake will rise as it bakes but will sink slightly as it cools due to the lack of gluten. This is normal and gives the cake its signature fudgy, cracked texture.