If you love the flavor of a Mars Bar but want a breakfast that actually keeps you full, this one’s for you. These overnight oats taste like dessert yet pack in solid protein to start your day right. The texture is creamy, the chocolate-caramel notes are spot on, and the prep takes five minutes.

Mix them at night, wake up to a chilled jar, and you’re out the door. It’s a simple upgrade to a classic that feels special without extra fuss.

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What Makes This Special

Overhead shot of a chilled jar of Mars Bar Protein Overnight Oats just after an overnight rest, crea

This recipe blends the nostalgia of a Mars Bar with the practicality of meal prep. You get the rich combo of chocolate, caramel, and a hint of nougat-like creaminess, but in a balanced, filling bowl.

The trick is using chocolate protein powder and a quick caramel-style swirl to mimic that candy bar flavor. It’s indulgent without being heavy, and easy to customize for your diet and taste.

Ingredients

1/2 cup (45 g) rolled oats (old-fashioned, not instant)
1/2 to 2/3 cup (120–160 ml) milk of choice (dairy, almond, oat, or soy)
1/2 cup (120 g) Greek yogurt (or a thick dairy-free yogurt)
1 scoop (25–30 g) chocolate whey or plant protein powder
1 tablespoon cocoa powder (unsweetened)
1–2 teaspoons maple syrup or honey (adjust to taste)
1 tablespoon peanut or almond butter (for a nougat note)
1–2 tablespoons caramel sauce (store-bought or homemade; use a lighter drizzle for fewer calories)
1–2 tablespoons chopped chocolate (or mini chocolate chips)
Pinch of salt
Optional: 1 teaspoon chia seeds for extra thickness, splash of vanilla extract

Step-by-Step Instructions

Close-up detail of the “caramel swirl” step: thick, spoonable chocolate-protein oat mixture in a

Start with the base: In a jar or bowl, combine oats, protein powder, cocoa powder, and a pinch of salt. Stir to evenly distribute the dry ingredients.
Add the liquids: Pour in milk and add Greek yogurt.
Mix until no dry pockets remain. If using chia seeds or vanilla, stir them in now.
Sweeten and enrich: Add maple syrup or honey and the nut butter. Stir thoroughly.
The mixture should look thick but spoonable.
Caramel swirl: Gently fold in the caramel sauce. Don’t overmix—light swirls give that Mars Bar feel.
Top it off: Sprinkle chopped chocolate over the top. Press some pieces just under the surface so they soften overnight.
Chill: Cover and refrigerate for at least 4 hours, ideally overnight, to let the oats hydrate and flavors meld.
Serve: In the morning, give it a quick stir.
If it’s too thick, add a splash of milk. Optionally add a tiny extra caramel drizzle and a pinch of flaky salt.

Storage Instructions

Refrigerator: Keeps well for 2–3 days in an airtight jar. The texture thickens over time—add milk to loosen if needed.
Meal prep: Make 2–3 jars at once.
Add the caramel and chocolate just before eating if you prefer a cleaner swirl and firmer chips.
Freezer: Not recommended. The dairy and oats can separate and turn grainy after thawing.

Benefits of This Recipe

High in protein: Protein powder plus Greek yogurt delivers staying power for busy mornings.
Balanced energy: Oats provide slow-release carbs and fiber, making it more than just a sweet treat.
Customizable: Easy swaps for dairy-free, gluten-free, or lower-sugar versions.
Time-saving: Five minutes at night saves you from morning scrambling.

Pitfalls to Watch Out For

Too thick or too thin: Protein powder and chia can thicken a lot. Start with 1/2 cup milk and add more after chilling if needed.
Chalky texture: Some protein powders don’t blend well.
Whisk dry ingredients first and use a brand you like in shakes.
Overly sweet: Caramel plus chocolate chips can add up. Taste before adding extra sweetener.
Soggy toppings: If you prefer a crunch, add chocolate chips in the morning instead of at night.

Alternatives

Dairy-free: Use almond or soy milk and a coconut or almond yogurt. Choose a plant protein powder.
Gluten-free: Choose certified gluten-free rolled oats.
Lower sugar: Skip the maple syrup, use a lighter caramel or sugar-free caramel, and opt for 85% dark chocolate.
Peanut-free: Swap peanut butter for almond, cashew, or sunflower seed butter.
Extra crunch: Add roasted peanuts or a sprinkle of granola right before serving.
Mocha twist: Add 1 teaspoon instant espresso to the mix for a coffee-chocolate kick.

FAQ

Can I use quick oats instead of rolled oats?

Yes, but the texture will be softer and creamier, almost like a pudding.

Reduce the milk slightly to avoid a runny result.

What protein powder works best?

Chocolate whey blends smoothly and tastes closest to a candy-bar vibe. For dairy-free, choose a chocolate pea or rice blend and add a bit more milk if it thickens too much.

Do I need the yogurt?

No, but it adds a nougat-like creaminess and extra protein. If skipping, use more milk and consider adding a tablespoon of cream cheese-style spread or silken tofu for texture.

How can I make it ahead for the whole week?

Prep up to three jars at a time for best freshness.

On day 3, loosen with milk and add caramel and chocolate fresh if you want peak flavor.

Can I warm these oats?

Yes. Microwave in 20–30 second bursts, stirring in between. Add a splash of milk to maintain a creamy texture and avoid overheating the caramel.

Wrapping Up

Mars Bar Protein Overnight Oats deliver that chocolate-caramel comfort in a breakfast that actually fuels your morning.

They’re quick to prep, easy to tweak, and taste like a treat without the crash. Make a jar tonight, and tomorrow’s breakfast is sorted—sweet, satisfying, and ready when you are.