Maharja, if you include a top layer of cake, then I'd say there's a good chance it will get gummy (and yes, gumminess is a word). Plastic wrap might protect it, though not sure how much. I didn't notice the cake soaking up the cheesecake filling; as the filling is quite thick, it just sits atop the crust as it bake. And how about substituting brewed coffee or tea for the lime juice? Either of those flavors would marry well with dulce de leche, I think. Good luck with your cake — PJH

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