INGREDIENTS
1 cup
Zucchini
1
Egg, large
1 cup
All-purpose flour
1/2 cup
Bittersweet chocolate
1/4 cup
Cocoa powder, unsweetened
1/2 tsp
Salt, coarse
1 cup
Sugar
1/2 tsp
Vanilla extract, pure
1
Cooking spray, Nonstick
24
Walnut, halves
1/2 cup
Butter, unsalted
3 tbsp
Sour cream