1. 1. Preheat the oven to 400°F (200°C) and grease four ramekins with butter.

2. 2. In a microwave-safe bowl, melt the butter and cocoa powder together until smooth.

3. 3. In a separate bowl, whisk the eggs and coarse sugar together until well combined.

4. 4. Gradually pour the melted chocolate mixture into the egg mixture while stirring continuously.

5. 5. Divide the batter evenly among the prepared ramekins.

6. 6. Bake in the preheated oven for 12-14 minutes, or until the edges are set but the center is still slightly jiggly.

7. 7. Remove from the oven and let it cool for a few minutes before serving.

8. 8. Serve warm with a dusting of cocoa powder or a scoop of vanilla ice cream.