This single serving Nutella mug cake is ridiculously easy to make with just 3 ingredients. It's rich, dense, chocolatey and everything a flourless cake should be.
Combine all ingredients in an oversized microwave-safe mug. Mix vigorously with a small whisk until batter is smooth and the egg has been completely mixed in.
Cook in the microwave for about 1 minute 10 seconds. The cake should be set but may be slightly wet on top. Let cake cool for 15 minutes before serving. The cake will condense down during this cooling process. You can replate in a smaller mug/plate/ramekin before serving. You can top with powdered sugar or chocolate syrup.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.