Combine crushed graham crackers and melted butter; press into the bottom of a springform pan.
Beat cream cheese, powdered sugar, and mint extract until smooth.
Fold in whipped topping and a few drops of green food coloring if desired.
Stir in mini chocolate chips.
Spread filling over crust and smooth the top.
Refrigerate at least 4 hours or until firm.
Garnish with additional whipped topping and chocolate chips before serving.