Begin by softening the vanilla ice cream at room temperature for about 10 minutes until it is scoopable but not melted.
Take 8 Oreo cookies and place them on a baking sheet, cream side up.
Using a spoon or an ice cream scoop, place a generous amount of softened vanilla ice cream on top of each Oreo cookie.
Top each ice cream scoop with another Oreo cookie, cream side down, pressing gently to create a sandwich.
Once all sandwiches are assembled, use a spatula to smooth the ice cream around the edges if desired.
Roll the edges of each sandwich in mini chocolate chips if using, ensuring they stick to the ice cream.
Place the sandwiches back on the baking sheet and freeze for at least 2 hours or until firm.
Before serving, drizzle chocolate syrup over the top of each sandwich for an extra treat.