1
: Microwave half of the sweetened condensed milk in microwave-safe bowl at HIGH (100% power) 1 minute. Stir in 1 cup (250mL) chocolate chips until smooth, stir in marshmallows.
2
: Spread evenly by heaping tablespoon (15mL) on 14 graham crackers. Top with remaining graham crackers. Insert a wooden craft stick in center of each cookie.
3
: Microwave remaining sweetened condensed milk at HIGH (100% power) 1 minute, stir in remaining ½ cup (125mL) chocolate chips, stirring until smooth. Drizzle mixture over cookies and sprinkle with desired toppings. Let stand for 30 minutes for topping to set.