Hi there, Vonda! Without more details about your mother-in-law's recipe, it can be tricky to say what it will be like. Rather than submerging the cake, we'd recommend brushing it with the alcohol, or you can gently poke holes in the cake using a skewer and then brush the alcohol on so it permeates the cake better. We worry that the cake might become soggy if you were to submerge it, making it tricky to handle. You certainly can use orange juice or a simple syrup to glaze your cakes. We hope this helps and happy baking! 

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