Step 1

Stir the soy sauce, vinegar, and liquid smoke together in a small bowl or cup.

Step 2

Place the tofu slices in a shallow dish and pour the marinade over them.

Step 3

Marinate the tofu for at least 30 minutes at room temperature, or covered and chilled for up to 24 hours.

Step 4

Preheat the oven to 350°F and line a baking sheet with parchment paper.

Step 5

Arrange the tofu slices on the baking sheet in a single layer.

Step 6

Bake the tofu for about 40 minutes, carefully turning the pieces halfway through, until they're darkened and slightly shrunken.

Step 7

Remove the tofu from the oven and serve or use immediately, or chill for later.