Place pan over medium-high heat. To test if your oil is hot enough, using tongs, dip a corner of a tofu cube into the oil. If it begins to sizzle and cook, the oil is ready.
When oil is ready, place cubes of floured tofu in the pan. Turn heat down slightly and fry the tofu. Using tongs, turn the tofu cubes after 1 minute. Cook until cubes are a light golden brown.

