Frosted Chocolate Oreo Cookies

Name: Frosted Chocolate Oreo Cookies
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Cuisine: American
Ingredients: ½ cup unsalted butter (1 stick) (slightly softened OR straight from fridge and microwaved for 10 seconds); ½ cup light brown sugar; ¼ cup granulated sugar; 1 large egg; 2 teaspoons vanilla extract; ½ teaspoon baking soda; ½ teaspoon salt; ⅓ cup dark cocoa powder (I use Hershey's 100% Special Dark); 1 cup all-purpose flour; ¼ cup unsalted butter (half stick) (slightly softened OR straight from fridge and microwaved for 10 seconds); 2 ounces cream cheese (softened); 1 teaspoons vanilla extract; pinch of salt; 1 ¼ cups powdered sugar; 3 Oreos (crushed)