Instructions

For the cake:

1. Preheat oven to 350º Fahrenheit.
2. In a large mixing bowl, cream butter and sugar together until fluffy.
3. Beat in eggs.
4. Add yogurt and vanilla. Mix well.
5. In a separate bowl, combine flour, cocoa powder, baking soda, and salt.
6. Add to wet ingredients and mix until uniform.
7. Stir in zucchini.
8. Transfer to greased baking pan.
9. Bake for 35-40 minutes.

For the frosting:

1. Add chocolate chips and peanut butter to a small saucepan.
2. Cook on medium heat until melted and smooth. Stir frequently.
3. Spread over cake.