Low-cal overnight oats are a chilled, no-cook breakfast made by soaking rolled oats in milk and yogurt until soft and creamy. This single-serving version uses unsweetened milk, plain Greek yogurt, chia seeds, and strawberries for a lightly sweet bowl that is easy to mix the night before and customize when you serve it.

Ingredients

1/2 cup (40 g) old-fashioned rolled oats
1/2 cup (120 ml) unsweetened plain almond milk, or skim dairy milk
1/3 cup (75 g) plain nonfat Greek yogurt
1 teaspoon (4 g) chia seeds
1 teaspoon (7 g) pure maple syrup, optional
1/4 teaspoon (1 ml) vanilla extract
1/4 teaspoon ground cinnamon (about 0.7 g)
1 small pinch fine salt (about 0.3 g)
1/2 cup (75 g) sliced strawberries, fresh or thawed from frozen

Instructions

Choose a container. Set out a clean jar or small lidded container with room for the oats to expand as they absorb liquid. A container holding at least 12 ounces (355 ml) works well for this single portion. If you are preparing breakfast to take with you, use a leak-resistant lid and keep the container refrigerated until you leave.
Mix the creamy base. Add the oats, almond milk, Greek yogurt, chia seeds, maple syrup if using, vanilla, cinnamon, and salt. Stir thoroughly, scraping the bottom and sides so no dry oats or clumps of chia remain. The mixture should look loose and spoonable at this point; it will thicken as it chills.
Add the fruit. Fold in about half of the sliced strawberries, saving the rest for serving. Mixing some fruit into the oats lets its juice flavor the base, while holding some back gives the finished bowl a fresher texture. If using frozen berries, thaw them in the refrigerator first and drain away excess liquid so they do not make the mixture unexpectedly runny.
Cover and chill. Seal the container and refrigerate for at least 6 hours. An overnight chill of about 8 to 12 hours is convenient, but the minimum time in the recipe facts is 6 hours. The oats are ready when they have absorbed the milk and feel tender rather than dry or chalky in the center.
Stir and adjust before eating. Give the oats a good stir, then taste. If they seem too thick, mix in 1 to 2 tablespoons (15 to 30 ml) of milk. If you want more sweetness, add a little maple syrup; finish with the reserved strawberries. Serve cold, or follow the warming guidance in the FAQ if you prefer a hot breakfast.

Tips

Use rolled oats for the intended texture. Old-fashioned rolled oats soften while keeping a little structure, so the result is creamy rather than completely smooth. Quick oats work if that is what you have, but they absorb liquid faster and make a softer, more porridge-like mixture. Steel-cut oats are much firmer and generally need cooking, so they are not a direct swap in this no-cook recipe.
Stir well before chilling. Chia seeds can gather into small gelled clumps if they are sprinkled on top and left unmixed. Stir the ingredients carefully, wait a minute, then stir once more if you see seeds settling at the bottom. This small extra check helps the oats thicken evenly.
Keep the sweetener modest and taste later. The berries, vanilla, and cinnamon add flavor even if you leave out the maple syrup. Fruit sweetness varies, and the oats can taste different once chilled, so it is easy to add a little sweetener just before serving. For a more tart bowl, use plain yogurt and omit the syrup.
Make substitutions with the texture in mind. Skim milk can replace almond milk in the same amount; it gives the oats a slightly fuller dairy flavor. For a dairy-free bowl, use an unsweetened thick plant-based yogurt in place of Greek yogurt. Thin plant yogurts may leave the mixture looser, so begin with a little less milk and add more after chilling if needed.

Serving Suggestions

Serve the oats cold straight from the refrigerator for a quick breakfast, or spoon them into a bowl if you would like more room for toppings. The reserved strawberries are a simple finish; a few extra berries, a dusting of cinnamon, or a teaspoon of unsweetened cocoa can add flavor without changing the base recipe much. For crunch, add a small spoonful of chopped almonds or pumpkin seeds just before eating rather than stirring them in the night before, when they would soften.

If you want a more substantial meal, pair the jar with a hard-boiled egg or a piece of fruit on the side. Keep the add-ons separate until serving so each part retains its best texture. For a portable breakfast, use a wide-mouth container and pack any crunchy topping in a small separate container. Give the oats a final stir before taking a spoonful; the yogurt and fruit can settle or thicken differently during chilling.

Variations

Blueberry lemon: Swap the strawberries for 1/2 cup (75 g) blueberries and add 1/2 teaspoon (2.5 ml) finely grated lemon zest. Fresh or refrigerator-thawed frozen berries both work. The lemon zest adds a bright aroma without needing more syrup. If your berries are tart, taste the finished oats before deciding whether to sweeten them.

Apple cinnamon: Replace the strawberries with 1/3 cup (about 45 g) finely diced apple and increase the cinnamon to 1/2 teaspoon (about 1.3 g). A crisp apple keeps some bite, while a softer variety blends more into the oats. Add the apple before chilling if you like its flavor mellowed, or cut it fresh over the top just before serving for a crisper finish.

Chocolate: Whisk 1 teaspoon (2.5 g) unsweetened cocoa powder into the milk before combining it with the oats. Cocoa can make the mixture taste less sweet, so add maple syrup to taste rather than automatically increasing the amount. A few sliced strawberries or banana pieces work well on top. For the simplest ingredient list, leave out the cinnamon in this version.

Higher-protein texture without extra powder: Use 1/2 cup (120 g) plain nonfat Greek yogurt and reduce the milk to 1/3 cup (80 ml). This produces a thicker, tangier bowl; stir in a splash of milk after chilling if it is too dense. Different yogurts vary in thickness, so make the adjustment by spoonfuls rather than adding a large amount at once.

Storage and Reheating

Keep the covered oats refrigerated at 40°F (4°C) or below, and return them to the refrigerator promptly after serving. Do not leave the prepared oats at room temperature for more than 2 hours. For best texture, eat this portion within 3 days; the berries soften as they sit, so the bowl is usually at its freshest during the first day or two. If making several portions, use clean individual containers and add delicate toppings shortly before serving.

Overnight oats are meant to be eaten cold, so reheating is optional. To warm a serving, transfer it to a microwave-safe bowl rather than heating a sealed jar. Microwave in 20- to 30-second bursts, stirring between each, until it reaches the temperature and texture you like; loosen it with a little milk if it thickens too much. Heating can soften the berries and make the oats more like porridge. Avoid repeatedly warming and cooling the same portion; heat only what you plan to eat.

Frequently Asked Questions

Can I make overnight oats without chia seeds?

Yes. Leave them out and prepare the rest of the recipe as written. Chia seeds help absorb liquid and give the mixture a thicker, more pudding-like texture, so the finished oats may be looser without them. Chill for the full 6 hours, then stir in milk only if needed; if they are too thin, add a spoonful of yogurt or a small amount of oats and let the mixture stand for a few minutes.

Can I use quick oats or steel-cut oats?

Quick oats can be used in the same quantity, although they become softer and less distinct than rolled oats. Check them after chilling because they may reach a pleasant texture before the full overnight period. Steel-cut oats are not a reliable one-for-one replacement here: they remain chewy and firm when merely soaked in cold milk. Cook steel-cut oats according to their package directions, cool them promptly, then add the other ingredients as a different, cooked-oat preparation.

Why are my overnight oats too thick or too runny?

Thickness depends on the oats, yogurt, and chia seeds, as well as how accurately the liquid is measured. If the chilled oats are too thick, stir in milk one tablespoon (15 ml) at a time. If they are too runny, let them sit for another 15 to 20 minutes, then reassess; extra time can help the oats absorb liquid. You can also mix in a teaspoon of chia seeds and chill for another 20 to 30 minutes, though this makes the texture more gelled.

Can I prepare a batch for several mornings?

Yes. Multiply every ingredient by the number of portions and divide the mixture among individual containers before chilling. Keeping portions separate makes serving easier and avoids repeatedly opening a large batch. Refrigerate them promptly and aim to eat them within 3 days for the best fruit texture. If using fresh-cut fruit, you can also keep it separate and add it each morning so it stays firmer.

Can I make this recipe dairy-free?

Yes. Choose unsweetened almond milk or another unsweetened plant milk and replace the Greek yogurt with a thick, plain plant-based yogurt. A thinner yogurt can make the oats less creamy, so start with 1/3 cup (80 ml) milk rather than the full 1/2 cup (120 ml), then add more after chilling until the texture suits you. Check that any flavored plant yogurt is not sweetened if you want to control the sweetness yourself.

Can I eat the oats warm?

Yes. Although they are usually served chilled, you can warm a portion in a microwave-safe bowl in short bursts, stirring between them, or heat it gently in a small saucepan with a splash of milk. Warm only until hot enough for your preference; prolonged heating can make the oats very thick. Add the fresh strawberry topping after warming for a cooler, brighter contrast.

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