2/3 cup heavy cream = 155 grams 1/2 cup light corn syrup = 155 grams 1/3 cup dark brown sugar = 67 grams 1/4 cup cocoa powder = 25 grams 6 oz. (browneyedbaker.com)
Ingredients: 1 cup sugar 1/2 cup light corn syrup 1 cup creamy peanut butter 2 cups rice crispy cereal 1 12 oz. (you-made-that.com)
If you don't want to buy it, you can use 2 tablespoons of light corn syrup in place of the glucose called for. (bakeyourday.net)