1. 1. Preheat the oven to 425°F (220°C)

2. 2. Grease ramekins with butter and dust with cocoa powder

3. 3. Melt chocolate and butter in a double boiler

4. 4. Whisk eggs, sugar, and vanilla until light and fluffy

5. 5. Gently fold in the melted chocolate mixture

6. 6. Add flour and mix until well combined

7. 7. Divide the batter into ramekins and bake for 12-15 minutes

8. 8. Let the cakes cool for a minute before unmolding

9. 9. Serve warm with a scoop of vanilla ice cream