INGREDIENTS
1
Egg yolk, large
2
Eggs, large
2 3/16 cups
All purpose flour
2 1/2 tsp
Baking powder
5/8 tsp
Baking soda
3/8 cup
Cocoa powder, unsweetened
5/16 cup
Cornstarch
1 1/2 cups
Granulated sugar
1/2 tsp
Salt
1 1/3 oz
Semi-sweet or bittersweet chocolate
1 tbsp
Sugar
1 tbsp
Vanilla extract, pure
2 2/3 oz
White chocolate containing cocoa butter
1 1/16 cups
Butter, unsalted
1/3 cup
Heavy whipping cream, very hot
2 tbsp
Milk
3/4 cup
Sour cream
1/4 cup
Whole milk
chopped