This easy gluten-free tiramisu layers coffee-soaked ladyfingers with a light mascarpone cream and a splash of Grand Marnier. Beating the egg whites separately gives the filling an airy texture, while a quick dip in completely cooled coffee keeps the biscuits tender without turning the dessert soggy.
Use pasteurized eggs because the eggs remain uncooked. Keep refrigerated at 40°F or colder and consume within 2 to 3 days. Regular savoiardi may be used when gluten is not a concern. For an alcohol-free version, replace the Grand Marnier with additional cooled coffee.