This chocolate craving cake is rich, moist, and incredibly decadent. A perfect treat for chocolate lovers featuring a silky chocolate sour cream frosting.
Preheat the oven to 350°F if using a glass or ceramic pan or 325°F if using metal. Line an 8x8-inch baking dish with parchment paper and grease lightly.
In a large mixing bowl, whisk together flour, sugar, cocoa powder, baking powder, baking soda, and salt.
Add the egg, milk, vegetable oil, and vanilla extract. Mix on low speed until combined, then increase to medium and mix for 2 minutes.
Stir in warm water or coffee until batter is thin and smooth.
Pour the batter into the prepared baking dish and bake for 35 to 40 minutes, or until a toothpick inserted in the center comes out with a few crumbs.
Allow cake to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
Heat chocolate chips in a microwave-safe bowl at 50% power in 30-second intervals, stirring until melted.
Stir in sour cream and vanilla extract until smooth and fluffy.
Spread frosting evenly over the cooled cake.
Notes
This cake is best served chilled or at room temperature and can be stored covered at room temperature for up to 3 days or refrigerated for up to a week.