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 9×13 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.