Black Sesame Seeds (1 cup)
in a pan or oven and then ground them into powder. Smaller particles can be accepted for the filling.
In a bowl, mix black sesame powder with
Salt (1/4 tsp)
Powdered Confectioners Sugar (1 cup)
Unsalted Butter (2/3 cup)
and mix well. Place in fridge for 1 hour until slightly hardened.
Sweet Glutinous Rice Flour (2 cups)
into a large bowl, add
Water (1/4 cup)
in the center and wait for 10 minutes. Then pour in the
Water (3/4 cup)
Grasp to form a dough and keep kneading for a couple of minutes until smooth; shape the dough into a long log so that you can make similar pieces in the following step.
Take one piece and shape it into a bowl, then scoop around 1/2-1 Tbsp of toasted black sesame filling into the center. Seal the rice dumpling completely and make it as round as possible.
Put them in a large pot with water to cover them. Bring to a boil, and continue cooking for another 1-2 minutes after the tang yuans have floated to the surface.
Scoop out together with the cooking liquid and serve with sugar, sweet osmanthus or syrup.