Chocolate zucchini cupcakes

I found this recipe (and many others) on a fellow bloggers website. She has some yummy stuff. Click here to check it out! I'm sure many of you are sick of seeing recipes on zucchini, but this one was pretty tasty!
2 (1 ounce) squares unsweetened chocolate, melted
3 eggs
1 3/4 cups packed brown sugar
1 cup vegetable oil
2 cups all-purpose flour
1 teaspoon baking powder
1 teaspoon baking soda
1/2 teaspoon salt
2 cups grated zucchini
1/2 cup mini chocolate chips
3/4 cup chopped walnuts

Preheat the oven to 350 degrees F (175 degrees C).
In a large bowl, beat eggs with sugar for about 10 minutes or until thickened and pale. Blend oil and cooled chocolate into the beaten egg mixture.
In a small bowl stir together flour, baking powder, baking soda and salt; stir flour mixture into egg mixture until just blended. Stir in zucchini and mini chocolate chips. Using an ice-cream scoop, spoon batter into 24 paper-lined or greased muffin cups, filling the cups 2/3 full (I think mine were fuller than 2/3).
Bake for 20 minutes or until fork or toothpick inserted in a cupcake's center comes out clean. Let cool in pans on rack for 10 minutes. Remove from pans; let cool completely. Spread with chocolate cream cheese frosting below frosting and garnish with walnuts.