Chocolate Zucchini Cake with Chocolate Cream Cheese Frosting

INGREDIENTS

2 cups

all-purpose flour

1/2 cup

unsweetened cocoa powder

2 1/2 tbsp

dark cocoa powder

3/4 tsp

salt

1 tsp

baking soda

1/2 tsp

baking powder

1/2 cup

unsalted butter, melted

1/2 cup

vegetable oil

1 3/4 cups

granulated sugar

large eggs

1/2 cup

buttermilk

2 tsp

vanilla extract

2 1/2 cups

unpeeled shredded zucchini, preferrably at room temperature

1/2 cup

unsalted butter, nearly at room temperature

8 oz

cream cheese, nearly at room temperature

3 cups

powdered sugar

6 tbsp

unsweetened cocoa powder

1 tsp

vanilla extract