Children do not all have the same learning style, nor the same interests. Some children are keen to figure out the alphabet, copy and print letters and learn to write their name. Others are not at all interested to the point where they declare paper and pencil activities their “arch enemies” (direct quote). But all children love cookies. Mix up a batch of dough or use frozen dough–some kinds are better than others. Use only a few letters at a time and just watch how quickly a reluctant learner can identify a letter when the reward is eating the cookie. True, this could also be called bribery but the cookies can be the nutritious kind. 
Here are some other ideas for ways to use letters at mealtimes. On pancake mornings pour a little batter in the shape of a letter and wait just a few seconds for the edges to dry. Then pour the rest of the pancake on top of the letter. When you flip the pancake over, it really does show the letter. Oh, the letter needs to be backwards. For plain pancakes, pour the syrup in a letter. Ketchup can be squirted in letter shapes, too. Carrot slices and circles can make the alphabet. Time for a cup of T.