INGREDIENTS
4 tbsp
unsalted butter, softened
1/4 cup
granulated sugar
1 tsp
vanilla extract
1
large egg white, at room temperature
2 tbsp
sour cream, at room temperature
6 tbsp
flour
1/2 tsp
baking soda
fine salt
1
box Jell-O Instant Vanilla Pudding Mix
1 1/2 cups
cold milk
2 oz
unsweetened chocolate, chopped
4 tbsp
unsalted butter, softened
1 1/2 cups
powdered sugar
1 tbsp
sour cream
1/4 cup
cocoa powder