Place tofu block between paper towels on a plate. Set another plate on top, and put a weight on top of the plate (such as a can) to press the water from the block of tofu while you prepare the sauce.
In a medium bowl stir together the soy sauce, maple syrup, liquid smoke, garlic powder, black pepper, barbecue sauce and brown sugar until smooth.
Slice tofu into 1/4 inch thick slices and dip them in the sauce to coat. Place in a tightly sealed container and refrigerate for 1-2 hours.
Preheat the oven to the lowest temperature, around 200° F (95° C). Line the oven rack with heavy duty aluminum foil and place in the lowest position of the oven. Place the tofu slices on the foil.
Bake for about 8 hours, checking and turning over tofu slices every few hours. Tofu jerky is done when it is hard and uniformly dark in color.

1 (14 ounce) package firm tofu, drained
3 tablespoon soy sauce
2 teaspoon maple syrup
3 tablespoon pure maple syrup
1/2 teaspoon liquid smoke flavoring
1 teaspoon garlic powder
1/2 teaspoon ground black pepper
3 tablespoon barbecue sauce of choice
2 teaspoon brown sugar