White Asparagus: Delicate Spring Spear Rich in Folate, Fiber & Subtle Sweetness
Grown underground to prevent chlorophyll, white asparagus develops a mild, nutty sweetness—steam or simmer briefly, then finish with olive oil, citrus or hollandaise.
What Is White Asparagus?
White asparagus are **asparagus spears (Asparagus officinalis) grown under mounded soil or opaque covers** so sunlight cannot trigger chlorophyll production. The result: pale ivory spears with tender, thicker peeled stalks and delicate sweetness compared to green’s grassy notes.
Nutrition (per 100 g cooked, drained)
| | Amount | %DV |
|---|---|---|
| Calories | 20 kcal | — |
| **Carbohydrate** | 3.9 g | — |
| – Fiber | 2.1 g | 7 % |
| **Protein** | 2.2 g | 4 % |
| **Folate (B9)** | 52 µg | 13 % |
| Vitamin C | 6 mg | 7 % |
| Potassium | 202 mg | 4 % |
| Iron | 1.1 mg | 6 % |
Contains natural **glutathione** & phenolic antioxidants.
Potential Benefits
- **Folate + fiber** support cell division and gut health.
- Very **low calorie & low sodium**; good for weight-conscious or heart-friendly menus.
- **Glutathione & phenolics** contribute antioxidant defense.
- High water content aids hydration during spring/early summer.
Drawbacks & Precautions
- Requires **peeling of lower stalk** (tough outer layer) adding prep time.
- Season is short & price higher vs green asparagus.
- Natural **asparagusic acid** can cause sulfuric urine odor (harmless).
- Overcooking = mushy texture & sulfur notes—cook just to tender-crisp.
Culinary Uses
- Trim woody ends; peel from just below tip downward.
- **Blanch or steam 5–8 min** until knife-tender; shock or serve warm.
- Classic pairings: hollandaise, brown butter & toasted almonds, shaved truffle, citrus vinaigrette, prosciutto.
- Slice into risotto, spring soups or quiche; reserve peeled skins for light stock.
Selecting & Handling
- Choose **firm, straight spears** with tight tips & moist, freshly cut ends.
- Diameter is preference: thicker = meatier & less fibrous interior.
- Avoid drying or browning at cut end (age).
Storage
Wrap spears in a damp towel or stand upright in a jar with 2 cm water; refrigerate and use within **3–4 days** for peak sweetness. Do not wash until just before use.
Sustainability Notes
Forcing under soil requires **labor and plastic covers**, raising footprint vs green. Buying **local seasonal harvest** reduces transport. Peels & trimmings are compostable; minimal pesticide use when locally grown in cool climates.
Key Takeaways
✔︎ Mild, sweet spring vegetable
✔︎ Source of folate, fiber & antioxidants
✖︎ Higher cost & prep (peeling); avoid overcooking.
- 1. White Asparagus