A mexican recipe of tamales with pineapple. Sweet tamales are a Mexican dessert made from a sweet masa corn dough and filled with a variety of fruit, nut and sugary fillings. Common fillings include raisins, pineapples, fruit preserves, cajeta and dulce de leche. Each region and state has certain types of tamales, so many that the variety is estimated at between 500 and 5,000 throughout the country.