Dissolve the gelatin in the boiling water. (I measured the water into a large measuring cup, then stirred the gelatin right in. You could also do this in a heatproof bowl.) Let cool to room temperature.
In a medium mixing bowl or the bowl of a stand mixer fitted with the paddle attachment, beat together the oil, applesauce, and eggs until combined. Beat in the cooled gelatin. Reduce the speed to low, then slowly add in the cake mix, stopping as soon as the dry ingredients disappear.
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