This is a simple recipe for soft and chewy Oni Manju (a type of Japanese sweet) that doesn't require a steamer, using only two ingredients (three if you include water) – sweet potatoes and pancake mix. Dice the sweet potatoes, remove the bitterness, and mix them with pancake mix and water to make the dough. Simply place it on a baking sheet and heat it in the microwave, and you'll have a delicious Japanese sweet in no time. It features a gentle sweetness and a chewy, fluffy texture, making it perfect as a snack.