Use the largest holes of a box grater or the shredding disc of a food processor to finely shred your carrots. Don't buy pre-shredded carrots in a bag — the shape is different and will prevent the carrot from melting into the batter to just the right degree. Also, don't grate the carrot on the smaller holes of a box grater. This shape is too small to yield the perfect texture, and also a real pain in the butt to achieve.