According to Official Guinness Records,
The largest dulce de leche candy was a Cajeta de Sayula weighing 1,615.5 kg (3,561 lbs and 9 oz) and was made by Cajeteros de Sayula SC de PR de RL (Mexico) in Sayula, Jalisco, Mexico on 28 February 2017. The cajeta mixture made of milk, sugar, vanilla and rice flour was poured into a traditional wooden casing and cooked with a blow torch 7 times.
For a complete list of 2017 records, please visit 2017 Guinness Records in Mexico.