Recently, I was a groomsman in a wedding… for my 81-year old grandmother. (She is just as amazing as you’d imagine.) Because we live states apart, our communication through the years is done mostly through phone calls, letters, and gifts. And every year on my birthday, she would send me a cake, a pound cake of cartoonish perfection with a smell so sweet it permeated the whole house. It was my favorite—that is, until one year I ate an entire…