Chocolate Chip Zucchini Cake

Ingredients

• 1 cup brown sugar
• 1/2 cup sugar
• 1/2 cup unsalted butter, melted
• 1/2 cup sour cream
• 1 large egg
• 2 teaspoons vanilla extract
• 2 cups fresh, shredded zucchini, packed
• 2 cups flour
• 1/2 cup dark cocoa powder
• 1 teaspoon salt
• 1 teaspoon baking soda
• 1 1/2 cups miniature chocolate chips, divided
• 4 ounces cream cheese, softened
• 1/4 cup butter, softened
• 1/2 teaspoon clean vanilla extract
• 1/2 teaspoon salt
• 1/2 cup marshmallow cream
• 2 1/2 cups powdered sugar
• 2 Tablespoons whipping cream