The "three milks" in tres leches cake are whole milk, evaporated milk and condensed milk, and the cake also contains heavy cream. All of these ingredients add significant fat and calories to this traditional Mexican dessert, which means you should only eat it on special occasions. When you do indulge, limit yourself to just one serving to help spare your waistline.

Nutrition facts vary, but one recipe from PBS yields 404 calories per serving, while a restaurant version contains 430 calories per serving. A slice of the restaurant cake also provides 28 percent of the daily value for fat, as well as 55 percent of the DV for saturated fat and 65 percent of the DV for cholesterol. A serving also contains 8 percent of the DV for sodium and 19 percent of the DV for carbohydrates. In addition, each serving contains 10 grams of protein, providing about 22 percent of the recommended dietary allowance for women and 18 percent of the RDA for men.