Chocolate PB Bars

I made these to take to work. They taste ok but they don't hold together. not enough marshmallow cream.

chocolate-peanut butter squares
3 cups popped plain popcorn
2 cups crisp rice cereal
2 cups circle oat cereal
1 TB light margarine
1 oz unsweetened chocolate, chopped
1 (7 1/2 oz) jar marshmallow creme
1/4 cup honey roast peanut butter
2 TBS unsweetened cocoa powder
1 1/2 tsp vanilla extract

Line 9x13 inch baking pan with foil, allowing the foil to extend over the rim of the pan by 2 inches. spray with nonstick spray combine the popcorn, rice cereal, and oat cereal in a very large bowl put the butter and chocolate in a large nonstick saucepan and cook over low heat. cook, stirring until melted, 1-2 minutes. remove pan from heat, add marshmallow creme, peanut butter, cocoa powder and vanilla. returen the skillet to heat and cook,s tirring until well blended and hot, 2-3 min scrape the marshmallow mixture on top of the cereal mixture. with a rubber spatula, tir vigourously until the cereal mixture is evenly coated. scrape into the baking pan. spray your hands with nonstick spray; press down firmly on the mixture to form an even layer; let cool completely. lift from teh pan using the foil as handles. with a serratedk nife lightly sprayed with nonstick spray cut into 18squares. Yield: 18. Per serving= 97 Calories; 3g Fat (29.7% calories from fat); 2g Protein; 17g Carbohydrate; 1g Dietary Fiber; 0mg Cholesterol; 97mg Sodium. Exchanges: 1/2 Grain(Starch); 0 Lean Meat; 1/2 Fat; 1/2 Other Carbohydrates.