INGREDIENTS
1
Egg, large
2
Egg whites
3/4 cup
All-purpose flour
1/2 tsp
Baking powder
1/4 cup
Chocolate chips, semisweet
1/2 cup
Cocoa, unsweetened
1/4 tsp
Salt
2/3 cup
Sugar
1 tsp
Vanilla extract
1/4 cup
Walnuts
2 tbsp
Espresso
4 tbsp
Butter, unsalted
1/2 cup
Greek yogurt, nonfat