Thonmai
On the evening of Karthigai Deepam, the lamps go up first - a row of clay agal deepams along the veranda, then the smell of sesame seeds hitting a hot iron kadai. In Arani, where the sesame comes off the fields nearby, ellu urundai isn't a fancy sweet. It's the dark, nutty ball your grandmother pressed into your palm while the deepams were still being lit, warm from her hands and just slightly sticky.
These sesame-and-jaggery balls are made almost entirely from two ingredients you'd find in any Tamil pantry. The trick is in the roasting, the temperature of the jaggery syrup, and rolling them fast before everything sets. A small measure of wood-pressed gingelly oil rounds out the flavour and keeps your palms from burning during the rolling.
Why sesame belongs to this festival
Karthigai Deepam falls in the Tamil month of Karthigai, usually late November or early December, right when the sesame harvest is in. Ellu (sesame) is a seed of the cold season - warming, oily, dense with energy. Older households made ellu urundai and pori urundai together, one dark and one puffed, and offered both before anyone ate. There's a quiet logic to it: the festival that ends the harvest season celebrates the seed that carries you through the cold months ahead.
What you'll need
The proportions matter more than the exact grams, so learn the ratio.
White sesame seeds - 1 cup, ideally unhulled or lightly hulled for a fuller taste.
Jaggery - 3/4 cup, grated or broken into small pieces, the darker the better.
Wood-pressed gingelly oil - 1 teaspoon, for greasing your palms and adding aroma.
Water - 2 to 3 tablespoons, just enough to melt the jaggery.
Dry ginger powder (sukku) - a small pinch, optional but traditional.
The method, step by step
Dry-roast the sesame on a low flame in a heavy kadai, stirring constantly. You want them to turn a shade darker and start to crackle and pop, releasing that unmistakable toasted smell - about six to eight minutes. Take them off the moment they're fragrant; burnt sesame turns bitter and there's no rescuing it. Let them cool completely.
Melt the jaggery with the water on a low flame until it dissolves. Strain out any grit, then return it to the pan and cook until it reaches soft-ball consistency - drop a little into cool water and it should form a soft, pliable ball you can pick up. This is the stage that decides everything. Too early and the urundai won't hold; too late and they turn rock hard.
Stir in the sukku powder, then the roasted sesame. Mix quickly off the heat. Now rub a little wood-pressed gingelly oil on your palms and start rolling small balls while the mixture is still hot enough to shape but cool enough to touch. Work fast - it sets as it cools. If it hardens before you finish, warm the pan gently for a few seconds.
Why wood-pressed oil, and why just a teaspoon
You don't fry anything here, so the oil's role is small but real. A wood-pressed gingelly oil, cold-crushed in a marachekku the way it's done in Arani, keeps the natural sesame aroma intact instead of the flat, deodorised smell of refined oil. Rubbing it on your palms means the same seed that's in the urundai is on your hands - the flavours don't fight. If you'd like to keep some for your kitchen year-round, our wood-pressed oils come from the same sesame belt these recipes grew out of.
One honest note: "wood-pressed" describes how the oil is extracted - crushed slowly in a wooden ghani rather than heated and chemically refined. It's a description of process, not a graded certification, and it doesn't by itself make the sweet healthier than any jaggery-and-sesame ball. What it does is keep the taste closer to what your grandmother's ellu urundai actually tasted like. On Karthigai Deepam, next to a row of flickering lamps, that closeness is really the whole point.