Here's a Teriyaki marinade that we like. Soak 3 or 4 lbs of jerky sized pieces in this for 24 hrs and then smoke as you wish. Soemtimes we add some maple syrup and also some red pepper flakes to provide more heat.
Teriyaki Marinade
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Use for 3 to 4 lbs of beef or poultry
1 C. soy sauce
2 crushed garlic cloves
2 tsp crushed or ground ginger root
2 tbl brown sugar
1 tsp pepper