Chocolate Cupcakes with Cream Cheese-Oreo-Buttercream Frosting

Name: Chocolate Cupcakes with Cream Cheese-Oreo-Buttercream Frosting
Prep time: 40 min
Cook time: 20 min
Total time: 1 h
Cuisine: American
Ingredients: 1.3333333730698 cups all-purpose flour; 0.66666668653488 cup cocoa powder; 1.5 teaspoons baking soda; 1 teaspoon baking powder; 1 teaspoon instant espresso powder; 0.5 teaspoon ground cinnamon; 0.5 teaspoon salt; 1.3333333730698 cups white sugar; 0.66666668653488 cup brown sugar; 4 eggs; 0.33333334326744 cup water; 2 teaspoons vanilla extract; 1 cup sour cream; 0.25 cup vegetable oil; 1 (8 ounce) package cream cheese, at room temperature; 7 tablespoons butter, at room temperature; 1 teaspoon vanilla extract; 3 cups confectioners' sugar; 18 chocolate sandwich cookies (such as Oreo®); 2 tablespoons milk, or more as needed