Which vegetable cut measures 1/8 x 1/8 x 1/8?

The measurement of 1/8 x 1/8 x 1/8 corresponds to a brunoise cut, which is a technique used in culinary arts for finely dicing vegetables. To achieve a brunoise, the chef first juliennes a vegetable into thin strips measuring roughly 1/8 inch wide and then turns those strips to cut them into tiny cubes, also measuring 1/8 inch in each dimension. This particular cut is known for its ability to cook evenly and for providing a refined appearance in dishes, often used in sauces, soups, and garnish. The precision of this cut allows it to blend seamlessly into a recipe, enhancing both texture and visual appeal.

The other vegetable cuts, while important in their own rights, do not fit the specified measurement. Julienne involves cutting vegetables into long, thin strips, typically 1/8 inch by 1/8 inch in cross-section but not in three dimensions. Rondelle refers to cutting cylindrical vegetables into circular discs. Chiffonade is a cutting technique for leafy vegetables or herbs, creating thin ribbons rather than a three-dimensional dice. Thus, brunoise is distinct in its finely diced dimensions and is the correct answer.