Tangyuan (Glutinous Rice Balls)

Step 1: Toast and Grind the Sesame

Place black sesame seeds in a dry non-stick pan over medium-low heat. Toast for 3-4 minutes, stirring constantly, until the seeds are fragrant and slightly darker. Do not burn they go from toasted to burnt quickly. Transfer to a food processor or spice grinder and grind until the seeds release their oils and form a fragrant, slightly sticky paste. Alternatively, use pre-ground toasted black sesame powder for convenience. Transfer to a bowl and mix in the melted butter or coconut oil and granulated sugar until fully combined. The mixture should hold its shape when pressed if too dry, add 1 more tablespoon of melted butter. Roll the filling into small balls, about 8g each, and refrigerate for 30 minutes until firm. Chilling makes them much easier to handle during wrapping.

Step 2: Make the Rice Dough

Place glutinous rice flour in a large mixing bowl. Add warm water gradually, mixing with a fork or chopsticks as you pour. Continue adding water until the dough comes together into a soft, smooth ball that doesn't stick to your hands the texture should be similar to soft playdough. If it's too crumbly, add water a teaspoon at a time; if too sticky, dust with a little more flour. Knead for 3-4 minutes until the dough is silky and smooth. Cover with a damp cloth to prevent drying while you prepare the filling. For the best texture, let the dough rest for 10 minutes this relaxes the gluten and makes it easier to work with.

Step 3: Fill and Shape the Balls

Divide the dough into 15 equal portions, about 15g each. Flatten one portion in your palm into a thin round disc thin enough that light shows through but thick enough not to tear. Place one cold sesame ball in the center. Using your thumb and index finger, pinch the edges together and work your way around, sealing the filling inside completely. Cup the ball in your palm and gently roll between your palms to create a smooth, round sphere. The dough should fully encase the filling with no cracks. Dust each finished ball lightly with extra glutinous rice flour to prevent sticking. Repeat with remaining dough and filling. Work efficiently the dough can dry out if left uncovered too long.

Step 4: Boil Until They Float

Bring a large pot of water to a full rolling boil. Gently slide the tangyuan into the boiling water one by one they will sink to the bottom initially. Stir once gently with a spoon to prevent sticking to the bottom of the pot. Maintain a vigorous boil. As the tangyuan cook, they will gradually rise to the surface this is the exciting moment. Once all the balls float to the surface, continue boiling for another 2-3 minutes until they look slightly translucent and puffed. Test one by pressing gently it should feel yielding and slightly springy. If using frozen raw tangyuan, add 1-2 extra minutes of cooking time after floating.

Step 5: Make the Sweet Ginger Soup

While the tangyuan cook, prepare the soup. Combine 800ml of water and sliced ginger in a small pot. Bring to a boil, then simmer for 10 minutes to extract the ginger flavor. Add rock sugar (or white sugar) and stir until fully dissolved. Taste it should be lightly sweet with a pleasant ginger warmth. If you like it spicier, let the ginger simmer longer. Strain out the ginger slices if you prefer a clear soup. The soup should be served warm, not boiling tangyuan placed in boiling soup will burst. Keep the soup on the lowest possible heat.

Step 6: Assemble and Serve

Use a slotted spoon to transfer the cooked tangyuan from the boiling water into individual serving bowls. Ladle the warm sweet ginger soup over the tangyuan about 100-120ml per bowl. The soup should be warm (not bubbling) when poured. Garnish with a pinch of dried osmanthus flowers if using, and a few sesame seeds. Serve immediately while hot. The contrast of the warm, fragrant soup with the just-cooked, yielding rice balls is what makes this dessert so satisfying. Fresh homemade tangyuan are best eaten immediately they are noticeably different from store-bought frozen ones.

Tips

• Toast sesame properly: The sesame must be toasted until fragrant raw sesame has a flat, grassy taste. Watch carefully and stir constantly; they burn quickly once the oils are released. A good toast gives the filling its characteristic deep, nutty aroma.
• Chill the filling: Refrigerating the sesame filling for at least 30 minutes firms it up, making it significantly easier to wrap. Soft filling squishes out while you're trying to seal the dough.
• Don't overcook the soup: The ginger soup should be warm, not boiling, when served. Boiling soup makes the rice balls swell and go mushy. Keep it on the lowest heat while the tangyuan boil.
• Dust with flour to prevent sticking: Lightly dust each wrapped tangyuan with glutinous rice flour before placing them in the pot. They stick together easily once wet.

Prep ahead: Uncooked tangyuan can be arranged on a floured plate, frozen solid, then transferred to a freezer bag. Cook directly from frozen add 2-3 minutes to the boiling time. The sesame filling can be made up to 1 week in advance and refrigerated. The dough should be made fresh on the day.

FAQ

Can I use pre-ground sesame instead of grinding my own?
Yes pre-ground toasted black sesame powder (available at Asian grocery stores) works perfectly. Mix with melted butter and sugar as directed, and the filling is ready in 2 minutes with no grinding required.

What if my dough is too sticky or too dry?
Too sticky: add flour one teaspoon at a time until manageable. Too dry/crumbly: add warm water a teaspoon at a time. The dough should feel like soft earlobe smooth, pliable, and not at all tacky.

Why did my tangyuan burst open?
The most common cause is adding too much filling. Use 8g of filling per ball and stretch the dough thin enough to cover it. Another cause is dropping them into boiling water too hard slide them in gently.

What other fillings can I use?
Red bean paste (sweetened azuki paste), smooth peanut butter, lotus seed paste, or even Nutella all work beautifully. For a savory twist, try a finely minced pork and vegetable filling.

How do I store leftover raw tangyuan?
Arrange in a single layer on a plate dusted with glutinous rice flour, freeze until solid, then transfer to a freezer bag. They'll keep for up to 3 months. Cook from frozen without thawing.