Instead of rum in the cake, use 1 tablespoon rum extract plus enough water to measure 1/3 cup. In the topping, substitute 1 teaspoon rum extract for the rum.
In Spanish, tres leches means "three milks." The milk trio in this recipe is whipping cream, whole milk and sweetened condensed milk.
To toast coconut, spread in ungreased shallow pan. Bake uncovered at 350°F 5 to 7 minutes, stirring occasionally, until golden brown.
To toast pecans, spread in ungreased shallow pan. Bake uncovered at 350°F 6 to 10 minutes, stirring occasionally, until light brown.