INGREDIENTS
2
Eggs, large
1 tbsp
Corn syrup, light
1 1/2 cups
All-purpose flour
1 tsp
Baking powder
1/2 tsp
Baking soda
6 oz
Chocolate, good-quality semisweet
1/3 cup
Cocoa powder, best-quality
2 1/2 cups
Confectioners' sugar
1 cup
Sugar
3 tsp
Vanilla
1
Butter
9 oz
Butter, unsalted
1 1/4 cups
Sour cream