Overnight oats are about as low effort as breakfast gets, but a lot of people stop at the basic oats and milk combo and miss out on how much better it can be with a bit of protein worked into the base. Once you get the ratios right, it becomes a five minute job the night before that turns into a genuinely filling breakfast by the time you wake up, rather than something you're hungry again from an hour later.

The starting point is simple. Half a cup of rolled oats, a scoop of Whey Protein Isolate or Whey Protein Concentrate, and enough milk to cover everything with a bit of room to spare, usually around three quarters of a cup depending on how thick you like it. Stir it through properly so the protein powder doesn't clump at the bottom of the jar, then leave it in the fridge overnight. The oats soften and soak up the liquid while you sleep, and by morning you've got a creamy, ready-to-eat bowl that just needs a stir.

Where people run into trouble is texture. Whey powder on its own can sometimes leave the oats a bit gluggy if you use too much liquid or not enough oats to balance it out. If you find your batches coming out too thick or too thin, adjust the milk in small amounts the next time rather than changing the oats or protein powder, since that ratio is doing most of the textural work. A spoonful of yoghurt mixed in as well helps smooth things out and adds a bit of tang that works nicely against sweeter mix-ins.

Once you've nailed the base, the flavour combinations are where overnight oats really earn their keep. Mashed banana and a swirl of peanut butter stirred through before you refrigerate it gives you something close to a dessert for breakfast. Frozen berries added straight to the jar will thaw and bleed a bit of colour and juice into the oats overnight, which looks great and tastes even better. If you're using a natural sweetener like monk fruit or allulose instead of sugar, add it in with the milk at the start so it dissolves evenly rather than sprinkling it on top afterwards.

Casein powder is also worth trying if you want a thicker, more pudding-like result rather than a looser oat texture. Because casein absorbs liquid more slowly and sets firmer than whey, using it in place of some or all of your whey scoop will give you oats that are almost spoonable rather than pourable by morning, which some people prefer for a heartier start to the day.

The real advantage of building your own base rather than following someone else's exact recipe is that you can scale it up for meal prepping. Make four or five jars on a Sunday night, each with a different fruit or flavour mixed in, and you've got breakfast sorted for most of the working week without having to think about it again until you're ready to eat.