Peel the sweet potatoes, trim the ends, and cut them into small pieces.

Place the sweet potato pieces in a bowl and add a small amount of water.

Cover the bowl and microwave for 4–6 minutes until the sweet potatoes are soft.

Drain the water, leaving about 3 tablespoons, and discard the rest.

Mash the sweet potatoes thoroughly with a fork.

Add cheddar cheese, butter, salt, and sugar to the mashed sweet potatoes and mix well.

Shape the mixture into small, round balls.

Microwave the sweet potato balls for 3 minutes.