Prepare the Oreos and Base
1-Separate 6 Oreo cookies, setting aside the: Separate 6 Oreo cookies, setting aside the cream filling in a small bowl.
2-Crush the chocolate cookie parts into small: Crush the chocolate cookie parts into small pieces using the bottom of a glass or a rolling pin.
3-In a medium saucepan, combine milk and: In a medium saucepan, combine milk and heavy cream, then heat over medium-low heat until steaming but not boiling (about 3-4 minutes). Pro tip: Save a few whole Oreos for garnishing and a couple extra for crushing as topping.

Create the Chocolate Mixture
4-Add cocoa powder, sugar, and salt to: Add cocoa powder, sugar, and salt to the warm milk mixture, whisking continuously until dissolved.
5-Add chocolate chips and stir until completely: Add chocolate chips and stir until completely melted.
6-For the smoothest result, sprinkle in dry: For the smoothest result, sprinkle in dry ingredients gradually while whisking to prevent lumps. Kitchen hack: To prevent a film from forming on top of the milk, keep stirring occasionally while heating.

Add the Oreo Flavor
7-Add the crushed Oreo cookie pieces and: Add the crushed Oreo cookie pieces and the reserved cream filling to the hot chocolate.
8-Stir continuously until everything is melted and: Stir continuously until everything is melted and well incorporated (about 2 minutes).
9-Remove from heat and stir in the: Remove from heat and stir in the vanilla extract. Expert tip: If you prefer a smooth drink without cookie pieces, strain the mixture through a fine-mesh sieve.

Serve and Garnish
10-Pour the hot chocolate into mugs and: Pour the hot chocolate into mugs and top with whipped cream.
11-Sprinkle with additional crushed Oreo cookies and: Sprinkle with additional crushed Oreo cookies and drizzle with chocolate syrup if desired.
12-For an impressive presentation, place a whole: For an impressive presentation, place a whole Oreo cookie on the rim of each mug. Presentation tip: Serve with a long spoon so guests can scoop up the cookie bits as they drink.