Behind the Recipes Gâteau fraisier—a precisely crafted cake featuring sponge cake, creamy custard-based filling, and only the most exquisite strawberries—is a celebration of summer. Save Saved Peer into the case of a Parisian pâtisserie in June and you’re sure to spot a gâteau fraisier. With layers of golden sponge cake sandwiching creamy filling and perfect strawberries (“fraise” means strawberry), and often sporting a neat, pale-green marzipan lid, le fraisier heralds the arrival of summer.