The Jewish custom of eating candied fruit and cakes on the Sabbath and Festivals is a lovely one, and despite that they may have various designs on them, they [our predecessors] had no reservations concerning the prohibition of moheq [erasing]. We note that despite that they may have all kinds of decorations, they have no letters at all; since these shapes cannot be considered writing but resemble forms made by striking with a hammer, moheq does not apply, and they had no misgivings concerning the prohibition of erasure…
The rule that applies, despite that the letters or words may be made of the dough itself, and an adult may not break the cake on the Sabbath because of [the proscription of] moheq, being that it is nevertheless a Jewish custom to eat candied fruit and cakes on the Sabbath and on Festivals, it that it is [as valid as] Torah and is permitted a priori, and despite that they may have all kinds of shapes, one needn't worry at all about [transgressing] moheq.