I suppose I could give you a little help. You can view the ingredients here http://www.ussmokeless.com/en/cms/P...Ingredients/Ingredients_by_Brand/default.aspx
Sodium carbonate is washing soda, Arm and Hammer should be easy enough to find. The ammonium carbonate is something you could skip if you had to. I would like to get some myself and have seen it available on line. For a recipe you will basically follow a snus making recipe with a sweetener added. Higher temperatures can be used if you are not concerned about TSNA's. I've seen cook temps and times like 350 f for three hours. Fire cured tobacco will get you closer to a cope flavor. Look at E-Bay and Amazon for ingredient too, like wintergreen if that's what you want. You can keep it simple and just heat up your water in a pot, put the salts and sugars in, cook the tobacco on low in that for a while, then add your glycerin and flavors. Bam...done! Well, you are supposed to let it rest for a week. Specific proportions of ingredient can be somewhat variable per preference. Half cup flour, tablespoon sweetener, half teaspoon Soda, half teaspoon salt would be good starting amounts. The water cooks off so maybe start with a cup then add more as needed while stirring. Have fun experimenting and good luck.
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