Preheat the oven to 425 degrees.
Butter and flour 4 ramekins and set aside.
Add the butter to a microwave safe bowl and melt in the microwave. Add chocolate to butter and stir until chocolate is melted.
Crack eggs into a bowl and add sugar. Whisk until the egg & sugar mixture is light and thick.
Add egg mixture to chocolate and add flour and vanilla. Stir to combine.
Divide the batter into the ramekins.
Place ramekins onto a baking sheet and bake for 13 minutes. Remove from the oven and let sit for one minute.
Turn ramekin upside down onto place and lift up ramekin - cake should slide out.
Top with raspberries and serve.