Dou Dou (豆豆)
Golden, shatteringly crisp fried sweet potato and taro — the beloved night-market snack you can now make at home with one simple batter. 夜市飄香的炸地瓜、炸芋頭，外酥內綿，黃金粉漿比例一學就會！
📹 Watch the Recipe
Recipe by 芭樂媽的家 Qistin Wong TV
🥘 Why This Recipe Works
Night-market fried sweet potato (炸地瓜 zhà dìguā) and taro (炸芋頭 zhà yùtou) are thin slices of root vegetable cloaked in a golden, craggy crust that shatters with every bite. The magic is in the batter: a 60:30:30 blend of all-purpose flour, sweet potato starch, and cornstarch with a pinch of baking soda, whisked to a silky, slow-flowing consistency. That exact ratio is what gives street vendors their signature crunch — a crust that somehow stays crisp even after the fritters cool down.
This recipe comes from 芭樂媽 Qistin Wong, a Malaysian-Taiwanese vegan home cook whose night-market cravings turned into a family favorite: she buys fried sweet potato from roadside stalls every time she visits Malaysia, and her daughter asks for this exact snack by name. Two vegetables, one batter — sweet potato brings caramel sweetness and a tender, creamy heart, while taro brings a nutty, fluffy texture with an almost chestnut-like aroma. Together they make the most satisfying plant-based snack plate you can fry at home.
This version: 12 ingredients, one pan, 30 minutes.
🛒 Ingredients
| Sweet Potato (地瓜) | 3 medium (~600 g) | Red-fleshed is sweetest; any variety works |
| Taro (芋頭) | ¾ of a large tuber (~400 g) | Wear gloves when peeling — raw taro can irritate skin |
| White Sesame Seeds (白芝麻) | 1 tbsp | Black sesame works too and looks striking |
| Frying Oil (食用油) | 2–3 cups | Neutral, high-smoke-point oil (peanut, avocado) |
| Pepper Salt (胡椒鹽) | to serve | Or chili powder / Sichuan pepper salt |
| All-Purpose Flour (中筋麵粉) | 60 g | Base of the golden batter |
| Sweet Potato Starch (地瓜粉) | 30 g | The secret to the crunch |
| Cornstarch (玉米粉) | 30 g | Adds lightness |
| Baking Soda (小蘇打粉) | 2 g | Creates an airy, crisp crust |
| Vegetable Oil (植物油) | 15 g | Into the batter |
| Water (水) | 130 g | Add gradually; adjust to coating consistency |
👨🍳 Instructions
Step 1: Prep the Vegetables
- Peel the sweet potatoes and taro, then slice them into thin pieces about 3–5 mm thick — thin slices fry through quickly and turn extra crisp.
- Qistin mixes varieties for fun: red-fleshed sweet potato (sweetest), yellow (mild), and chestnut sweet potato (栗子地瓜).
- Smart storage: slice extra taro and freeze in portions — thaw, cut into any shape, and cook straight from frozen.
Step 2: Whisk the Golden Batter
- Combine 60 g flour, 30 g sweet potato starch, 30 g cornstarch, 2 g baking soda, and 15 g oil in a bowl.
- Add the water gradually — start with 120 g, then add up to 10 g more only if the batter feels too thick (total 130 g).
- Stir until smooth, glossy, and slow-flowing — it should cling to the vegetables and coat the back of a spoon.
- Fold in the sesame seeds for aroma, color, and a little extra nutrition.
Step 3: Heat the Oil
- Pour about 2–3 cm of oil into a wok or pot and heat over high.
- Judge readiness by the oil lines (油紋): when dense ripples stream across the surface, the oil is ready — roughly 170–180°C.
- Use less oil and fry in small batches — it keeps the temperature steady and uses far less oil overall.
Step 4: Fry the Sweet Potato
- Dip each slice into the batter, let the excess drip off, and lay it in the oil with a little space between slices.
- Do not touch the slices until the batter sets into a crust — then flip occasionally so every side turns evenly golden.
- Remove when golden, not deep brown: residual heat keeps darkening the slices after they leave the oil.
Step 5: Fry the Taro
- Between batches, scoop out the fallen batter crumbs so they don’t burn and darken the fresh oil.
- Coat the taro slices in a slightly thicker layer of batter than the sweet potato.
- Drop the heat to medium or medium-high — the oil is already hot from the first batch, and taro needs gentler, longer frying to cook through without burning on the outside.
Step 6: Serve
- Drain on a rack or paper towel, sprinkle with pepper salt (or chili powder), and eat hot.
- The fritters stay crisp even after cooling — perfect for snack platters, afternoon tea, and lunchboxes.
💡 Tips & Substitutions
| How do I know the oil is hot enough? | Wait until dense ripples (“oil lines”) stream across the surface (~170–180°C). A drop of batter should sizzle and float up immediately. |
| Why do my sweet potato slices turn black? | Sweet potato darkens fast, and residual heat keeps cooking it after removal. Pull the slices while still golden, and scoop out batter crumbs between batches. |
| My taro is burnt outside but raw inside. | Taro takes longer than sweet potato. Fry it in a second batch at medium/medium-high heat with a slightly thicker batter coat so the outside doesn’t brown before the center is done. |
| Can I reuse this batter for other vegetables? | Yes — it’s an all-purpose crispy batter. It’s great on mushrooms, eggplant, zucchini, okra, or broccoli. Add water until it reaches a coating consistency. |
| The batter is too thick / too thin. | Add the water gradually. Start with 120 g and add the final 10 g only if it feels stiff. It should flow slowly and cling to the vegetables. |
📊 Nutrition
Per serving (serves 4 as a snack or side)
~350 cal · Protein: 4g · Carbs: 52g · Fat: 15g · Fiber: 5g
Ingredients
Method
- Peel the sweet potatoes and taro, then slice them into thin pieces about 3–5 mm thick. Thin slices fry through quickly and turn extra crisp. Mix varieties for fun — red-fleshed sweet potato is sweetest. Extra taro can be sliced and frozen in portions.
- Combine 60 g flour, 30 g sweet potato starch, 30 g cornstarch, 2 g baking soda, and 15 g oil. Add water gradually — start with 120 g, adding up to 10 g more only if too thick (total 130 g). Stir until smooth and slow-flowing, then fold in sesame seeds.
- Pour about 2–3 cm of oil into a wok or pot and heat over high. The oil is ready when dense ripples (oil lines, 油紋) stream across the surface — roughly 170–180°C. Use less oil and fry in small batches to keep the temperature steady.
- Dip each slice into the batter, let the excess drip, and lay it in the oil with space between slices. Do not touch until the batter sets into a crust, then flip occasionally for even golden color. Remove while still golden — residual heat keeps darkening the slices.
- Scoop out fallen batter crumbs between batches so they don't burn and darken the oil. Coat taro slices in a slightly thicker batter layer. Drop the heat to medium or medium-high — the oil is already hot, and taro needs gentler, longer frying to cook through.
- Drain on a rack or paper towel, sprinkle with pepper salt or chili powder, and eat hot. The fritters stay crisp even after cooling — perfect for snack platters and afternoon tea.
Notes
🌱 Why This Dish
Fried sweet potato and taro are pillars of the night-market snack world (夜市小吃 yèshì xiǎochī). In Taiwan, the island itself is nicknamed “番薯” (sweet potato) for its shape, and the humble tuber — once a famine food — is now a beloved symbol of rootedness and resilience. In Malaysia, 炸地瓜 (goreng keledek) sits beside fried bananas (炸香蕉) at roadside stalls; it’s Qistin Wong’s own nostalgia, and the reason this snack keeps showing up on her family table.
Taro (芋頭 yùtou) carries its own symbolism: “芋” sounds like “遇” (to meet), so eating taro at family gatherings is said to bring encounters with good people and good fortune. Because both roots are naturally vegan, crisp-fried versions have long been staples of temple fairs and vegetarian night markets, where Buddhist home cooks serve them as 素點心 — simple, meatless treats that prove plant-based food needs no compromise. Serve them with tea for 下午茶 (afternoon tea), or pile them into a bowl for movie night — just like the night market, one piece is never enough.
