Tzatziki: Greece's Yogurt and Cucumber Dip, Why the Cucumber Must Be Squeezed Bone-Dry, the Garlic That Mellows Overnight, and Why Greek Yogurt Cannot Be Substituted

Tzatziki is one of the most widely replicated preparations from Mediterranean cooking — it appears on supermarket shelves globally, on the menus of non-Greek restaurants, and in homemade versions at barbecues and dinner parties across the world. Most of what passes for tzatziki in these contexts is a paler version of the original: too thin, too mild, sometimes containing unnecessary additions, and typically under-seasoned.

The original is thick, cooling, garlicky, fresh-tasting, and creamy — it can be eaten as a dip with bread and vegetables, as a sauce alongside grilled meats (particularly souvlaki and lamb), spooned onto grilled vegetables, or eaten alone with a spoon. When properly made, it is one of the best things in Greek cooking.

---

The Cucumber Problem

Grated cucumber contains an enormous amount of water — approximately 90% of its weight is water. If the cucumber is added to the yogurt without removing this moisture:

1. Immediately: The tzatziki appears thick
2. After 15–30 minutes: The cucumber continues releasing water into the yogurt; the dip thins to a watery, separated mess

The process:

1. Grate the cucumber on the large holes of a box grater
2. Place in a clean kitchen towel or cheesecloth
3. Gather the edges; twist and squeeze as firmly as possible
4. Open; squeeze again
5. Taste a piece — it should be noticeably less watery than raw cucumber

Some recipes recommend salting the grated cucumber first (to draw out moisture via osmosis) before squeezing — this works but also seasons the cucumber, which must be accounted for in the overall salt level.

---

The Yogurt Requirement

Full-fat Greek yogurt (Total 0% is not correct — use full-fat) or strained yogurt:

• High protein and fat content provides the thick, creamy base
• Lower water content than regular yogurt means the tzatziki doesn't thin too quickly
• The acidity is milder and more rounded than regular yogurt

Alternatives in order of preference:

1. Full-fat Greek yogurt (best)
2. Labneh (strained yogurt — even thicker; produces a richer tzatziki)
3. Regular full-fat plain yogurt strained through cheesecloth for 4 hours (approximates Greek yogurt)

What not to use: Low-fat yogurt, non-fat yogurt, regular unstrained yogurt, or sour cream.

---

The Garlic Timing

Raw minced garlic in tzatziki is initially very sharp. After refrigeration for 30 minutes to overnight:

• The garlic's sharp volatile compounds mellow slightly in the acid environment of the yogurt
• The flavor becomes more integrated rather than sitting on top of the other flavors

Make tzatziki at least 30 minutes ahead; overnight is significantly better. The tzatziki improves for up to 24 hours; after that, the garlic can become too dominant.

---

The Complete Recipe

Makes: 350ml | Time: 15 minutes + 30 minutes rest (overnight is better)

Ingredients

• 350g full-fat Greek yogurt
• 1 medium cucumber (approximately 250g), grated
• 2–3 cloves garlic, very finely minced or grated on a Microplane
• 2 tablespoons fresh dill, finely chopped (or fresh mint — both are traditional)
• 2 tablespoons extra-virgin olive oil, plus more for drizzling
• 1 tablespoon white wine vinegar or lemon juice
• 1 teaspoon fine salt (adjust — the squeezed cucumber may have absorbed some)
• White pepper

Method

1. Prepare cucumber: Grate cucumber on the large holes of a box grater. Place in a clean kitchen towel; squeeze firmly, multiple times, until as much water as possible has been removed. The grated cucumber should look dry and compressed.

2. Combine: In a bowl, combine yogurt, squeezed cucumber, garlic, dill, olive oil, and vinegar. Season with salt and white pepper; stir well.

3. Rest: Cover; refrigerate minimum 30 minutes (overnight is better). Taste before serving and adjust salt, garlic, and acid.

4. Serve: At cool room temperature (not fridge-cold). Drizzle with olive oil; garnish with a little extra dill and a few olives if desired.

---

Related reading: Souvlaki Greek Grilled Meat Skewer Guide | Moussaka Greek Guide | Raita Indian Yogurt Dip Guide