Pop popcorn according to package directions and set aside.
In a large saucepan, melt butter.
Continue cooking until butter begins to turn golden brown.
Add marshmallows and stir constantly until melted.
Remove from heat and stir in vanilla.
Add popcorn and Golden Grahams and fold into the marshmallow mixture.
When cool enough to handle, lightly spray hands with nonstick cooking spray.
Scoop about 1 cup of mixture and press it into a ball.
Sprinkle with mini chocolate chips and gently press them into the ball.
Place on waxed paper, parchment, or a silicone baking mat to cool.