Dorayaki

It originally only had one layer, and the current shape was invented in 1914 by the Ueno Usagiya.
In Japanese, dora means "gong", and this is probably the origin of the name of the sweet.
The famous Japanese anime cat robot character Doraemon likes to eat dorayaki very much. This is a kind of punning, though his name comes not from "dorayaki" but from the word "doraneko" (stray cat.) The dorayaki was a plot device several times throughout the series. In Japan, a company sells a limited version of dorayaki called Doraemon Dorayaki every year from March to September.

Ingredients:
3 eggs
2/3 cup sugar
1/2 tsp baking soda
3 Tbsp water
1 cup flour, sifted
3/4 lb anko (sweet azuki beans)
*vegetable oil for frying

Preparation:

Put eggs and sugar in a bowl and whisk very well. Dissolve baking soda in water. Add the water in the egg mixture. Add sifted flour in the egg mixture gradually. Heat a skillet or hot plate and lightly oil it. Pour a scoop of the batter into the skillet and make a small pancake. (*about 4 inches in diameter.) Turn over when bubbles appear on the surface. Repeat this process to make 8-10 pancakes. Cool the pancakes. Make pairs of pancakes and put a scoop of anko sweet beans between them. *Makes 4 or 5 dorayaki cakes.