To pan-fry tofu in a skillet, add 2-3 tbsp oil in the center of a skillet and swirl it to coat the entire skillet. Now, once the oil is nicely heated, add the tofu cubes to the skillet in a single layer. Cook on medium-high heat and turn over once the side becomes light golden in color. Cook from both sides on medium-high heat, until it turns golden brown in color.