Step 1

Preheat the oven to 350°.

Step 2

In a large mixing bowl, cream the butter, oil, and sugar.

Step 3

Add the eggs and mix.

Step 4

Add the sour cream and vanilla and mix well.

Step 5

In a separate bowl, mix the dry ingredients. Add the dry ingredients to the wet mixture and mix only to combine.

Step 6

Stir in the shredded zucchini, chocolate chips, and nuts if desired.

Step 7

Spread into a greased 9x13" pan and bake for 42 - 48 minutes or until a toothpick comes out with only a few crumbs.

Step 8

Cool and sprinkle with powdered sugar, or top it with chocolate ganache or your favorite frosting.

Step 9

Heat the cream in a saucepan over medium heat until almost boiling. Remove it from the heat, add the chocolate, and cover the pan.

Step 10

Let it set for 3 - 5 minutes, then whisk until smooth. Allow it to cool a bit and then pour the warm (not hot) ganache over the cooled cake. Allow the frosting to set for about 30 minutes before cutting the cake, or refrigerate until set.Or cool the ganache completely and spread it on the cake.