How many calories in flourless chocolate cake?

The calorie content of a flourless chocolate cake can vary based on the specific recipe and ingredients used, but on average, a typical serving (about 1 slice or 1/12 of a cake) contains around 300 to 400 calories. The main ingredients, such as chocolate, eggs, and sugar, contribute significantly to the calorie count. For a more accurate estimate, it's best to calculate based on the specific quantities and types of ingredients in your recipe.