INGREDIENTS
1
Egg
2 1/2 tsp
Baking powder
1 1/8 cups
Cocoa powder
3 2/3 cups
Flour
1 cup
Powdered sugar
1 tsp
Salt
1 1/2 cups
Sugar
1/2 tsp
Vanilla extract
1 cup
Butter
3 tbsp
Milk
1 cup
Sour cream
1 cup
Semi-sweet dark chocolate chunks or chips
1 teaspoon soda