Whole spices keep longer and taste fresher; ground spices are quicker and blend invisibly. When to use each, how they behave in cooking, and a conversion table for swapping one for the other.
The short answer¶
Buy whole spices for anything you use regularly and can grind easily (cumin, coriander, pepper, fennel, cardamom, nutmeg), and buy ground spices that are hard to grind at home (turmeric, ginger, paprika, cinnamon in large quantities, sumac). Grinding your own is the biggest single improvement you can make to spice flavour; see grinding-spices.
Why whole spices last longer¶
The aroma of a spice lives in volatile oils held inside its cells. A whole seed or berry protects them behind its coat; grinding smashes those cells open and multiplies the surface area exposed to air and light. Ground spices therefore fade faster, typically losing noticeable strength within 6–12 months, while most whole spices keep well for two years or more in a cool, dark cupboard. See how-long-spices-last.
How they behave in cooking¶
| Whole | Ground | |
|---|---|---|
| Release of flavour | Slow and gentle, over the cooking time | Immediate and intense |
| Best stage to add | At the start, in hot fat or a long simmer | Bloomed in fat mid-way, or at the end |
| Texture | Can be fished out or left for bite | Dissolves invisibly |
| Burning risk | Low | High |
| Typical uses | Pilaf, biryani, stocks, pickles, braises, mulled drinks | Curries, baking, rubs, sauces |
Whole spices used as aromatics, such as bay, cinnamon sticks, star-anise, cloves and black cardamom, are usually removed before serving or left for diners to push aside. Tie small ones in muslin if you need to retrieve them.
Conversion table¶
Weight for weight, whole and ground are identical: 5 g of cumin seed makes 5 g of ground cumin. By volume it varies, because ground spice packs differently from seeds and pods. The figures below are approximate and widely used kitchen conventions; weigh if precision matters.
| Whole | Approx. ground equivalent |
|---|---|
| 1 tsp cumin seed | About 1 tsp ground (slightly more) |
| 1 tsp coriander seed | About 1¼ tsp ground |
| 1 tsp black peppercorns | About 1¼ tsp ground |
| 1 whole nutmeg | 2–3 tsp grated |
| 1 cinnamon stick, 7–8 cm | About ½–1 tsp ground |
| 10–12 green cardamom pods | About 1 tsp ground seeds |
| 3 cloves | About ¼ tsp ground |
| 1 star-anise | About ½ tsp ground |
| 1 tsp allspice berries | About 1¼ tsp ground |
| 2.5 cm (1 in) fresh ginger, grated (about 1 tbsp) | About ¼ tsp ground ginger |
| 1 clove fresh garlic | About ⅛ tsp garlic powder |
Fresh ginger and garlic are not interchangeable with their dried forms in flavour, only in rough strength: dried ginger is warmer and less zesty, garlic powder sweeter and less pungent.
🔁 Using ground instead of whole in a recipe
If a recipe asks you to fry whole spices at the start and you only have ground, do not add ground spices to very hot oil at the beginning; they will burn. Soften the onions first, lower the heat, then bloom the ground spices for 30–60 seconds. Use about three-quarters of the stated volume to start, as ground spices hit harder and faster.
Whole spices in the pot¶
- Bay, cinnamon, cloves, cardamom go into hot fat at the start of a pilaf or biryani, perfuming the oil before the rice goes in.
- pickling-spice and mulling-spice are whole-spice blends that steep in liquid.
- Stocks and braises take whole peppercorns, star-anise and juniper berries, which infuse over hours without clouding the liquid.
Common mistakes¶
- Biting into a whole clove or cardamom pod. Warn guests, or bundle the spices in muslin.
- Keeping ground spices for years. They do not become unsafe, just flavourless, which leads cooks to add more and more.
- Buying big bags of ground spice. Buy ground spices in small quantities from shops with a high turnover; see buying-spices.