INGREDIENTS
4 tbsp
unsalted butter, melted
1/4 cup
sugar
1 tbsp
sour cream
1
large egg white
1 1/2 tsp
instant espresso powder
6 tbsp
flour
1/2 tsp
baking soda
1/8 tsp
salt
1/2 cup
+ 2 tablespoons powdered sugar
1 oz
white chocolate, melted and slightly cooled
1/4 cup
+ 1 tablespoon cold sour cream