Protein Overnight Oats: 5 Recipes You’ll Actually Keep Eating

Protein overnight oats are rolled oats soaked in milk and Greek yoghurt with a scoop of whey stirred through, then left in the fridge until morning. Five minutes of prep tonight gives you a jar with roughly 35 g of protein tomorrow, with no cooking and no blender to wash.

Rotating flavours is what keeps the habit going, so this post gives you one base formula and five recipes: vanilla-berry, choc-banana, peanut butter and banana, tropical mango and coconut, and an Anzac-style jar. Each one uses a short list of ingredients you can read and recognise.

Quick Answer

• The formula: 40 g rolled oats, 125 mL milk, 60 g Greek yoghurt, 1 tsp chia and one 30 g scoop of whey. Soak for at least 6 hours in the fridge.
• The protein: Each jar below lands at about 36–37 g. Use 20 g of powder instead of a full scoop, which is roughly 29 g.
• Storage: Keep jars sealed in the fridge and eat within 3 days.

How to Make Protein Overnight Oats: The Base Formula

Every recipe here builds on a single ratio, so after a couple of jars, you can make it without measuring. Use a 400–500 mL jar with a tight lid.

Method

1. Add the milk and whey to the jar and shake or whisk until smooth.
2. Stir in the yoghurt, then the oats and chia.
3. Seal and refrigerate for at least 6 hours.
4. Stir in the morning, loosen with a splash of milk if needed, and add your toppings.
5. Enjoy your overnight oats with protein powder.

Our vanilla whey protein powder is the easiest place to start, because the flavour profile sits comfortably alongside fruit, nuts and warm spices.

How Much Protein is in Overnight Oats?

Oats on their own are a modest source of protein. A 40 g serve of rolled oats gives about 5 g. Add 125 mL of dairy milk, and you’re at about 9 g. The yoghurt and chia take it to about 15 g. One 30 g scoop of our whey adds 20 g, bringing your serve to about 35 g.

For context, the NHMRC’s recommended dietary intake for adults aged 19–70 is 0.84 g of protein per kg of body weight a day for men and 0.75 g for women. That works out to about 59 g for a 70 kg man and 49 g for a 65 kg woman.

To land at 25–30 g, use 20 g of powder (two-thirds of a scoop) or leave out the yoghurt. Oats, 150 mL of milk and a full scoop come to about 30 g.

We’ve calculated every figure in this post from the product label plus typical values from the Australian Food Composition Database. Brands vary, so treat them as close estimates.

5 Protein Overnight Oats Recipes

Each recipe makes one jar and uses one 30 g scoop of whey (20 g protein per scoop).

1. Vanilla Berry Protein Overnight Oats

Creamy, lightly sweet and fruity, like a berry yoghurt parfait you can eat with a spoon.

Ingredients

• 40 g (½ cup) rolled oats
• 125 mL (½ cup) milk
• 60 g (¼ cup) Greek yoghurt
• 1 tsp chia seeds
• 1 scoop (30 g) vanilla whey protein powder
• 75 g (½ cup) mixed berries, fresh or frozen
• Pinch of salt

Method

1. Shake the whey into the milk until smooth.
2. Stir in the yoghurt, oats, chia, salt and half the berries.
3. Refrigerate for 6+ hours, then top with the remaining berries.

Protein: About 36 g.

Tip: Frozen berries bleed colour and sweetness into the oats as they thaw. Stir gently for a swirled look.

2. Choc Banana Protein Overnight Oats

Deep and cocoa-rich, with banana for natural sweetness.

Ingredients

• Base formula, using 1 scoop (30 g) of chocolate whey protein
• 1 small banana (about 100 g)

Method

1. Mash half the banana into the milk, then whisk in the whey.
2. Stir in the yoghurt, oats and chia. Refrigerate for at least 6 hours.
3. Top with the remaining banana, sliced, in the morning so it doesn’t brown.

Protein: About 37 g.

Tip: Cocoa whey has a pleasant bitterness, like dark chocolate. Add 1 tsp of maple syrup if you prefer it sweeter.

3. Peanut Butter and Banana Protein Overnight Oats

Nutty, filling and a little like a peanut butter sandwich in a jar.

Ingredients

• 40 g (½ cup) rolled oats
• 150 mL milk
• 1 tsp chia seeds
• 1 scoop (30 g) vanilla whey
• 1 tbsp (20 g) natural peanut butter
• 1 small banana (about 100 g), sliced
• Pinch of cinnamon

Method

1. Whisk the peanut butter and whey into the milk until smooth.
2. Stir in the oats, chia and cinnamon. Refrigerate for 6+ hours.
3. Top with banana slices.

Protein: About 37 g.

Tip: Warm your peanut butter for 10 seconds in the microwave before whisking it into your high-protein overnight oats so it blends without lumps. The peanut butter adds creaminess, so you can skip the yoghurt with this recipe.

4. Tropical Mango and Coconut Protein Overnight Oats

Bright and summery. Mango season runs from October or November through to March in Queensland, with Northern Territory fruit arriving earlier, so this jar is at its best from spring into summer.

Ingredients

• Base formula with vanilla whey
• 80 g (½ cup) diced ripe mango
• 1 tbsp (5 g) desiccated coconut, toasted
• Finely grated zest of ½ lime

Method

1. Make the base jar and stir in half the mango.
2. Refrigerate for over 6 hours.
3. Top with the remaining mango, coconut and lime zest.

Protein: About 36 g.

Tip: Outside mango season, frozen mango cheeks thaw overnight and work just as well for overnight oats with protein powder.

5. Anzac-Style Protein Overnight Oats

Golden syrup, cinnamon, and coconut, with all the flavour of the oat biscuit.

Ingredients

• 50 g (about ½ cup plus 1 tbsp) rolled oats
• 125 mL milk
• 60 g (¼ cup) Greek yoghurt
• 1 scoop (30 g) vanilla whey
• 1 tbsp (5 g) desiccated coconut
• ½ tsp cinnamon
• 1 tsp golden syrup
• Pinch of salt

Method

1. Warm the milk for 10 seconds, stir in the golden syrup, then whisk in the whey.
2. Stir in the yoghurt, oats, coconut, cinnamon and salt.
3. Refrigerate for 6+ hours.

Protein: About 36 g.

Tip: Toast a spoonful of dry oats and coconut in a pan, then scatter over the top for a biscuit-style crunch.

How to Stop Protein Overnight Oats Going Lumpy or Chalky

Most problems with high-protein overnight oats having a funny texture come down to order and ratios.

• Clumpy: Always mix the powder into the liquid first, before adding the oats. Shaking a closed jar for 15 seconds works well.
• Chalky or paste-like: Whey absorbs liquid as it sits. Stir in 1–2 tbsp of milk in the morning, and add 25 mL more liquid next time.
• Too runny: Add 1 tsp of chia or 1 tbsp of extra oats, then rest the jar for 30 minutes.
• Bland: A pinch of salt lifts the overall flavour. Cinnamon, a squeeze of lemon or lime over fruit, and a drizzle of honey or maple syrup help too.
• Bored: Change one thing at a time, like the fruit, the spice or the crunch, and rotate through all five recipes. You can also explore our recipes for variety apart from overnight oats.

Storage and Meal Prep

Store each jar, sealed, in the fridge, which should be set to 5°C or below. For leftovers in general, keep them no longer than three days.

Here’s a simple routine to have your high-protein overnight oats ready every morning. Make three jars on Sunday night for Monday to Wednesday. Add fresh fruit and crunchy toppings on the morning you eat each jar. Then do the same on Wednesday night. Discard any jar that smells sour or has been out of the fridge for more than four hours.

Dairy-Free, Vegan and No-Protein-Powder Swaps

• Milk: Dairy, soy, almond, oat and coconut milk all work. Soy milk generally carries more protein than most other plant milks.
• Oats: Rolled oats keep their texture. Quick oats give a softer, porridge-like jar. If you want a different base, explore options like buckwheat.
• Thickener: Chia or ground flaxseed both work, and yoghurt can be dairy or coconut-based.
• Toppings: Crunch from macadamias, almonds, walnuts, or pumpkin seeds works all year. Then match the fruit to the season: peaches and cherries in summer, and mandarins and kiwis in winter.
• No powder: Use 100 g of Greek yoghurt or ricotta and a spoonful of nuts or seeds for a lower-protein jar.

Whey is a convenient top-up to a real-food breakfast, functioning as a convenient protein source to meet your protein intake. Whey protein concentrate also contains lactose. Browse our natural protein powder range if you’d like to compare options.

For anyone with coeliac disease, check Coeliac Australia’s advice on oats or go for a verified gluten-free base. If you have allergies, intolerances, kidney conditions or specific dietary needs, speak with your GP or an Accredited Practising Dietitian before adding protein powder.

Ready to Try Your First Jar?

Start with our vanilla berry jar, and rotate from there once the routine sticks. If you’d like to taste the whey before committing to a full tub, you can start with a free sample. Discover our range and shop Australian Natural Protein Company.