Ingredients

• 1-1/4 cups butter, softened
• 1-1/2 cups sugar
• 2 large eggs, room temperature
• 1 teaspoon vanilla extract
• 2-1/2 cups all-purpose flour
• 3/4 cup baking cocoa
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1/2 cup plain yogurt
• 1 cup grated zucchini
• 1 cup grated carrots
• 1 can (16 ounces) chocolate frosting