Try this Earthquake Cake recipe, or contribute your own.
While traditional chocolate sheet cakes rely on a uniform crumb and simple frosting, earthquake cake upends standard baking physics by layering raw mix over a bed of coconut and pecans before dolloping a heavy cream cheese mixture directly onto the surface. This unconventional layering causes the dense dairy dollops to sink and churn into the batter during the fifty-minute bake time at 350 degrees, forming distinctive craters and ridges as the structural elements shift.
Fat from the half-cup of melted butter and the full package of cream cheese interacts with the starches in the boxed mix to inhibit gluten development, yielding an exceptionally rich, fudge-like texture that actually improves over the course of twenty-four hours. Allowing the baked dessert to rest overnight in the refrigerator lets the high concentration of powdered sugar fully bind with the dairy moisture, solidifying the gooey center into a dense, truffle-like consistency.
Refrigeration extends the usable window of this high-sugar, high-fat dessert up to five days when stored in an airtight container. Cold slices can be consumed directly from the refrigerator for a firmer, more distinct separation between the chocolate cake layer and the sugary cheese strata, or individual portions can be microwaved for twenty seconds to restore the original molten consistency.
Leftover portions freeze remarkably well for up to two months if wrapped tightly in plastic wrap followed by aluminum foil to prevent freezer burn. Thaw frozen slices overnight in the refrigerator rather than on the counter to preserve the integrity of the cream cheese layer without introducing excess condensation into the crumb.