Overnight oats are rolled oats soaked in milk and yoghurt in the fridge until soft and creamy, then served cold with fruit and crunchy toppings. This easy Australian-friendly version uses familiar supermarket ingredients, takes about 10 minutes to prepare, and is ready for breakfast after an overnight chill.
Ingredients
- 1 cup (90 g) rolled oats, also called old-fashioned oats
- 1 cup (240 ml) milk, dairy or unsweetened plant milk
- 1/2 cup (120 g) plain Greek yoghurt
- 1 tablespoon (12 g) chia seeds
- 1 tablespoon (20 ml) maple syrup, or to taste
- 1/2 teaspoon (2.5 ml) vanilla extract
- 1 small pinch (about 0.5 g) fine salt
- 1 cup (150 g) fresh or thawed berries, for serving
- 1 medium banana (about 120 g), sliced, for serving
- 2 tablespoons (12 g) flaked almonds, for serving
Instructions
- Choose your containers. Set out two clean jars or lidded food containers, each with a capacity of at least 350 ml. You can also mix everything in one medium bowl and divide it in the morning, but individual containers make breakfast easy to take with you. Make sure the lids fit well so the oats do not absorb other fridge smells.
- Mix the dry ingredients. Add the rolled oats, chia seeds and salt to a bowl. Stir briefly to distribute the chia seeds through the oats; this helps prevent them from clumping when the liquid goes in. If you prefer to mix directly in the jars, divide these dry ingredients evenly between them first.
- Add the liquids and flavouring. Whisk the milk, yoghurt, maple syrup and vanilla in a measuring jug until the yoghurt is mostly smooth. Pour the mixture over the oats and stir thoroughly, scraping the bottom and sides of the bowl or jars. The mixture should look loose and milky at this point. The oats and chia will absorb liquid as they chill.
- Portion and refrigerate. Divide the mixture between the two jars if you mixed it in a bowl, then cover tightly. Refrigerate for at least 8 hours. This gives the oats time to soften and the chia time to thicken the mixture. Keep the jars in the main body of the fridge rather than in the door, where temperatures can vary more.
- Stir and finish before serving. In the morning, stir each portion well, bringing the thicker oats from the bottom up through the mixture. Add a splash of milk if you like a looser texture. Top with berries, sliced banana and flaked almonds, then eat cold. If the fruit has released juice while thawing, spoon it over the oats too for extra flavour.
Tips
- Use rolled oats for the best texture. They soften while keeping a pleasant, slightly chewy bite. Quick oats absorb liquid faster and can become pasty after a full night; steel-cut oats stay too firm for this no-cook method unless they are cooked first.
- Adjust the thickness after chilling. Oats vary a little by brand, and chia seeds continue to absorb liquid overnight. Stir first, then add milk a tablespoon (15 ml) at a time until the consistency suits you. Avoid adding a large pour before stirring, because the centre can be thicker than the surface suggests.
- Use a dairy-free swap if needed. Unsweetened soy, oat or almond milk can replace dairy milk in the same quantity. For the yoghurt, use a thick plain plant-based yoghurt; a thinner product may make the oats less creamy, so hold back a tablespoon or two of milk and add it in the morning only if needed.
- Keep toppings separate for better texture. Berries can be mixed into the oats before chilling, but banana browns and nuts lose their crunch when left overnight in the wet mixture. Add banana and almonds just before eating. If using frozen berries, thaw them in the fridge in a covered dish or add them frozen the night before.
Serving Suggestions
Serve the oats straight from the fridge for a cool, quick breakfast, or spoon them into a bowl if you want more room for toppings. The suggested berries, banana and almonds make a balanced contrast of juicy, soft and crunchy textures, but the toppings are flexible. In Australia, use whatever fruit is in season and good value: diced pear or apple works well in cooler months, while peaches, nectarines or mango are lovely when available. A spoonful of toasted coconut, pumpkin seeds or extra yoghurt can add another texture without changing the base recipe.
For a brunch spread, put the chilled oats on the table with small bowls of fruit, chopped nuts, seeds and a little extra maple syrup so everyone can finish a portion to taste. If you are packing breakfast to take away, leave a little space at the top of the jar for fruit and keep the container upright in an insulated lunch bag with a cold pack. Stir the oats before adding toppings so every spoonful has a similar amount of yoghurt and chia.
Variations
Apple and cinnamon: Stir 1/2 cup (60 g) finely grated apple and 1/2 teaspoon (1.5 g) ground cinnamon into the base before chilling. Grated apple releases moisture and sweetens the mixture, so you may want to reduce the maple syrup to 2 teaspoons (10 ml). Top with chopped walnuts or extra yoghurt.
Peanut butter and banana: Whisk 1 tablespoon (16 g) smooth peanut butter into the milk mixture, then chill as directed. The oats will be richer and slightly thicker; add 1 to 2 tablespoons (15 to 30 ml) extra milk in the morning if needed. Finish with banana slices and, if you like, a light dusting of cinnamon.
Chocolate and cherry: Stir 1 tablespoon (5 g) unsweetened cocoa powder into the milk and yoghurt mixture until evenly blended, then add 1/2 cup (75 g) pitted cherries as the topping. Cocoa can make the base taste less sweet, so adjust the maple syrup after mixing rather than adding extra automatically. Chopped dark chocolate is an optional garnish.
Higher-protein texture: Replace the 1/2 cup (120 g) Greek yoghurt with 3/4 cup (180 g) of a thick plain yoghurt and reduce the milk to 3/4 cup (180 ml). This makes a denser, tangier jar. If the oats seem too firm after chilling, loosen them with a little milk and stir again. The result depends on the thickness and ingredients of the yoghurt you choose.
Storage and Reheating
Cover the prepared oats and refrigerate them promptly, within 2 hours of mixing. Keep the fridge at 40°F (4°C) or colder, and eat the oats within 3 days for the best flavour and texture. The base can be mixed ahead without the fruit and nuts; add fresh toppings when serving. If you prepare several portions, label the jars with the date so it is easy to use the oldest one first. Discard a portion if it has been left at room temperature for more than 2 hours, or if it smells or looks unusual.
Overnight oats are usually served cold, so reheating is optional. To warm one portion, transfer it to a microwave-safe bowl, stir in a splash of milk and heat in short intervals, stirring between them so the centre warms evenly. For food safety, USDA guidance is to reheat leftovers to 165°F (74°C); use a food thermometer to check the temperature, then let the oats cool slightly before eating. Do not microwave a sealed jar, and add fresh fruit and crunchy toppings after warming.
Frequently Asked Questions
Can I make overnight oats without chia seeds?
Yes. Leave them out and keep the other ingredients the same for a softer, less gel-like result. Because chia thickens the mixture, the oats may be looser without it; start with the listed amount of milk, chill overnight, and stir in extra oats or a spoonful of yoghurt in the morning if you want a thicker bowl.
Can I use quick oats instead of rolled oats?
You can, but the texture will be noticeably softer and may turn mushy after 8 hours. If quick oats are all you have, use the same volume, begin with about 3/4 cup (180 ml) milk instead of 1 cup (240 ml), and add more after chilling only if the mixture is too thick. Rolled oats are the more reliable choice for this recipe.
How long do overnight oats need to chill?
Allow at least 8 hours for this recipe so the rolled oats soften and the chia seeds thicken the liquid. They can sit longer, up to the storage limit of 3 days, but the texture gradually becomes softer. If you only have a few hours, use quick oats for a softer result, though it will not have the same chewy texture.
Can I make this recipe with water instead of milk?
Yes, water will soften the oats, but the result is less creamy and less rich in flavour. A practical compromise is to use half milk and half water, or use a plain plant milk. If you use water, keep the yoghurt in the recipe for creaminess and taste the mixture before adding the full amount of maple syrup.
Why are my overnight oats too thick or too runny?
Too-thick oats usually need more milk, added gradually after stirring. If they are runny, first give them a thorough stir and a few minutes to settle; the chia may not have been evenly mixed or may need a little longer to hydrate. Next time, check that the chia seeds are well distributed and measure the milk rather than pouring by eye.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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