Greek yogurt is plain yogurt that has been strained until it is thick, creamy, and pleasantly tangy. This homemade version uses milk and a small amount of live-culture yogurt as a starter, then turns a long, gentle incubation and a simple refrigerator strain into a versatile Greek-style yogurt for breakfast, sauces, and snacks.
Ingredients
- 8 cups (1.9 L) whole milk
- 2 tablespoons (30 g) plain yogurt with live, active cultures, at room temperature
Whole milk makes a rich, smooth yogurt, but 2% milk also works and produces a somewhat lighter result. Choose plain yogurt whose label lists live cultures; flavored yogurt or a starter containing thickeners can affect the flavor and texture. The finished yield is usually about 4 to 5 cups (950 ml to 1.2 L), depending on how long you strain it.
Instructions
- Heat the milk. Pour the milk into a heavy-bottomed saucepan and set it over medium heat. Warm it gradually, stirring occasionally and scraping the bottom so the milk does not scorch. Use a food thermometer and bring the milk to 180°F (82°C). Hold it at that temperature for about 2 minutes, then take the pan off the heat. Heating the milk helps the finished yogurt set firmly. Avoid letting it boil; a rolling boil can leave a cooked-on layer and make the texture less even.
- Cool the milk to culture temperature. Leave the pan on the counter until the milk reaches 110°F (43°C), usually about 45 to 60 minutes. Stir occasionally and check with a clean thermometer. Do not add the starter while the milk is hotter than 115°F (46°C), because excessive heat can damage the live cultures. If you need to cool it faster, set the pan in a larger bowl of cool water and stir the milk gently. Keep water out of the pan.
- Mix in the starter. Put the room-temperature starter in a small bowl. Whisk in about 1 cup (240 ml) of the warm milk a little at a time until the mixture is smooth, then stir it back into the saucepan. This small-batch mixing prevents lumps of starter in the finished yogurt. Pour the milk into a clean, heat-safe container with a lid.
- Incubate until set. Keep the covered container at 105–110°F (41–43°C) for 8 hours without stirring. A yogurt maker is the most reliable option. Alternatively, use an insulated cooler with warm water around, but not inside, the container; check the temperature during incubation and add warm water if needed. An oven with its light on can work only if a thermometer confirms that it stays in range. The yogurt should look set when you gently tilt the container, though a little whey on the surface is normal. For a sharper flavor, you can incubate it for another 1 to 2 hours.
- Strain in the refrigerator. Set a fine-mesh sieve over a deep bowl and line it with a clean, damp cheesecloth or a clean, thin kitchen towel. Spoon or pour in the set yogurt, cover it, and refrigerate for 2 hours. The whey will drain into the bowl while the yogurt thickens. Spoon the strained yogurt into a clean container and stir gently until creamy. If it is thicker than you like, mix in a little of the reserved whey, one tablespoon (15 ml) at a time.
The recipe is ready after its 8-hour incubation and 2-hour strain. Those times make a thick, spoonable yogurt; draining time and final yield can vary with the cloth, sieve, and milk. Keep the yogurt and collected whey covered and refrigerated during straining rather than leaving them on the counter.
Tips
- Use a thermometer rather than guessing. The milk needs to be hot enough during the first stage and cool enough before adding the culture. A small difference can change how firmly the yogurt sets, so check both temperatures with a clean thermometer.
- Keep the utensils clean. Wash the saucepan, thermometer, whisk, storage container, and straining cloth well before use. Clean equipment helps the intended starter culture take hold and reduces the chance of an unwanted flavor or a failed batch.
- Choose the thickness you want. Two hours of draining makes a thick but still creamy yogurt. For a texture closer to soft cheese, leave it in the refrigerator longer, checking every hour. A longer strain means a smaller yield; save some whey to loosen the yogurt if it becomes too firm.
- Make a sensible milk substitution. Whole milk gives the fullest texture, while 2% milk makes a lighter yogurt. Nonfat milk can work, but the result is thinner and less creamy. Plant-based beverages do not behave like dairy milk in this recipe, so use a tested plant-yogurt method and its recommended starter instead of making a direct swap.
Serving Suggestions
Serve the yogurt cold in a bowl with honey, fruit, toasted nuts, or granola. For a savory plate, add grated cucumber, minced garlic, chopped dill or mint, lemon juice, and a pinch of salt for a tzatziki-style dip. Since family and regional recipes vary, season this mixture to suit the meal rather than treating one ratio as definitive. Greek yogurt also makes a cooling accompaniment to roasted vegetables, grilled meats, lentil dishes, and warm flatbread.
For a quick breakfast, spoon it over oats or cooked grains and add fruit just before eating. For a sauce, whisk yogurt with lemon juice, herbs, and a little water until it is pourable. If you are adding it to a hot soup or stew, take the pot off the heat and stir a spoonful of the hot liquid into the yogurt first; then mix that tempered yogurt into the pot. This helps reduce curdling, though yogurt can still separate if boiled.
Variations
Make it extra thick. Strain the yogurt for 4 to 6 hours in the refrigerator, checking its consistency as it drains. The result approaches labneh, a soft, spreadable strained yogurt used in a range of Eastern Mediterranean and Middle Eastern meals. It will yield less than the standard 2-hour strain, so start with the full batch if you want enough to serve a group.
Use 2% milk. Follow the same heating, cooling, culturing, and straining steps with 2% milk. Expect a lighter body than the whole-milk version. If you want it thicker, strain it longer rather than adding flour or another thickener.
Flavor it after straining. Stir in honey, vanilla, or a little jam for a sweet bowl, or add herbs, lemon zest, and salt for a savory dip. Keep the main batch plain and flavor individual portions if you want it to work in both sweet and savory dishes. Adding fruit or sweetener before incubation can interfere with the culture or make it harder to tell whether the yogurt has set properly.
Adjust the tang. The 8-hour incubation produces a moderate tang. A longer incubation usually makes yogurt more tart, while a shorter one tends to taste milder, but the exact result depends on the starter and the temperature. Keep the incubation temperature controlled and avoid extending it so long that you lose track of the batch.
Storage and Reheating
Transfer finished yogurt to a clean, covered container and refrigerate it promptly at 40°F (4°C) or colder. Do not leave it at room temperature for more than 2 hours. For best quality, use homemade yogurt within 5 to 7 days; use a clean spoon each time and discard it if you see mold or notice an unusual smell or appearance. Homemade yogurt may release a little whey during storage. Stir it back in, or pour it off if you prefer a thicker texture.
Keep strained whey covered in the refrigerator and use it within about 3 days, for example in a smoothie or in place of some of the liquid in a bread dough. Greek yogurt is not normally reheated as a side dish, and direct high heat can make it separate. For a warm sauce or soup, temper it as described above and add it off the heat. If it is mixed into leftovers, refrigerate those leftovers within 2 hours and reheat the food to 165°F (74°C); add a fresh spoonful of cold yogurt at serving time if you want a cool topping.
Frequently Asked Questions
Can I make Greek yogurt without a yogurt maker?
Yes. The important part is holding the inoculated milk at 105–110°F (41–43°C) for the incubation period. An insulated cooler with warm water around the container is a practical option. Check the temperature occasionally; household ovens can run warmer than expected, so use one only if a thermometer confirms a safe, steady range.
Why did my yogurt turn out runny?
Common reasons include a weak or inactive starter, milk that was too hot when the starter was added, or an incubation space that was too cool. It may also simply need more straining. If the yogurt has a clean smell and appearance, chill it and strain it longer; if you suspect contamination, discard it rather than trying to fix it.
Can I use store-bought Greek yogurt as the starter?
Yes, provided it is plain and lists live, active cultures. Use 2 tablespoons (30 g) for this quantity of milk. If the label does not indicate live cultures, or the yogurt contains flavorings, it is a less dependable choice. A fresh container is preferable to an old one that has been opened for a long time.
How do I know when the yogurt has incubated long enough?
After 8 hours, gently tilt the container. The yogurt should hold together as a soft set, with perhaps a little clear or pale whey at the edges. If it is still very liquid, continue incubation in 30-minute increments while keeping the temperature in range. Do not stir it during incubation, because stirring disrupts the set.
Can I use the finished batch to start another batch?
You can reserve 2 tablespoons (30 g) of fresh, plain yogurt from the batch, but the cultures can become less reliable over repeated generations. For a consistent set, use a fresh live-culture starter periodically. Always reserve starter with a clean utensil and refrigerate it promptly.
Is Greek yogurt different from regular yogurt?
Greek yogurt is generally yogurt that has been strained to remove some of its liquid whey, giving it a thicker texture than unstrained yogurt. Recipes and preferred thickness vary by household and region. This method makes a Greek-style strained yogurt at home; the amount of straining determines how close the result is to the thick texture you prefer.
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