Slice of icebox cake served on a small plate
To stretch this dessert even further, you can use slightly less whipped cream per layer and add more graham crackers, which is very true to its depression era roots.
For a hint of flavor without adding new ingredients, toast the graham crackers briefly in a low oven before layering so they develop a deeper, nuttier taste (let them cool completely before using so they don’t melt the cream). You can also fold a little extra powdered sugar into just the top portion of whipped cream to create a slightly sweeter top layer, mimicking a light frosting.
If you have cocoa powder on hand, sifting a teaspoon or two into the powdered sugar before whipping creates a subtle chocolate version without changing the basic structure. For a sturdier cake that holds up longer at room temperature, whip the cream to firm peaks but stop before it looks grainy; over-whipped cream can separate and weep.
Always keep the cake refrigerated until serving, and don’t leave it out at room temperature for more than 2 hours (or 1 hour if your kitchen is very warm), since it’s made with fresh dairy. Use pasteurized heavy cream, keep all utensils and the dish clean, and promptly return leftovers to the fridge to keep the dessert safe and fresh.
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