Add your graham crackers to the blender and blend until they are crumbs. Pour half the crumbs out into a bowl and set aside.

On top of the remaining crumbs in your blender, add yogurt, peanut butter, marshmallow, and ice cubes. Blend until smooth about 30 seconds.

Wet the rim of your cup with water and place face down into the bowl of crumbs until your rim is coated. Drizzle the chocolate syrup around your cup.

Pour the remaining crumbs that didn't stick on your cup back into the smoothie and stir. Pour into your glass and enjoy!