Preheat the oven to 170°C (338°F).
Mash the boiled soybeans.
Mix butter and yellow cheese powder together.
Add the mashed soybeans, almond flour, and erythritol, and stir thoroughly.
Roll the dough into bite-sized balls.
Line your oven pan with parchment paper.
Place the dough balls on the pan.
Bake at 170°C (338°F) for 15 minutes.
Let cool, then serve on a plate.