1. Preheat oven to 350 degrees Fahrenheit.
2. Prepare a double boiler fill the bottom saucepan with a few inches of water and bring to a boil. Nestle the topmost saucepan on top and add 3 Tablespoons of butter and the chocolate. Stir constantly until melted and smooth. Remove from the heat.
3. In a separate small saucepan, combine the remaining 4 Tablespoons of butter, corn syrup, and sugar, and stir together over low heat until butter is melted and ingredients are blended. Add to the melted chocolate, then stir in the beaten eggs and vanilla.