Can you leave overnight oats for 3 nights?

Yes, you can absolutely leave a 3 layer overnight oats jar in the fridge for up to 3 nights — and often even up to 5 days! Just be mindful of what ingredients you use. While the oats and milk base stay fresh for several days, softer fruits like bananas may brown faster. To keep things fresh, consider prepping 2–3 jars at a time or adding delicate toppings just before serving. Pro tip: Store crunchy toppings (like granola or nuts) separately and add them just before eating to keep them crisp.

What is the formula for overnight oats in a jar?

The basic formula for a 3 layer overnight oats jar starts with this easy ratio: ½ cup rolled oats ½–⅔ cup milk (dairy or plant-based) Optional: 1 tbsp chia seeds or Greek yogurt for thickness and protein 1–2 tsp sweetener, like honey or maple syrup That’s your base. Then, add a flavorful middle layer (like fruit or nut butter) and finish with a textured topping (like granola or nuts). Chill in the fridge overnight — and your layered oats will be ready by morning.

How to make layered overnight oats?

Making layered oats is simple and fun! Here’s a quick method to build your three layer overnight oats jar: Base: Mix oats, milk, sweetener, and any optional add-ins. Spoon it into the bottom of the jar. Middle layer: Add something flavorful like fresh fruit, Greek yogurt, or nut butter. Top layer: Finish with granola, seeds, or extra fruit for texture. Store it upright in the fridge for at least 6 hours (or overnight). You can prep several at once for the week ahead!

How long are overnight oats good for in a mason jar?

A properly sealed 3 layer overnight oats jar will last up to 5 days in the refrigerator. The key is to use fresh ingredients and store it in an airtight mason jar. For best results, eat jars containing soft fruits (like banana or kiwi) within 2–3 days. Oats with firmer fruits or yogurt will last longer without any issues. Always check for any off smells or discoloration before eating if it's been in the fridge for several days.

3 Layer Overnight Oats Jar – The Best 5-Day Breakfast Prep Idea

Description

A simple and delicious 3-layer overnight oats jar — perfect for busy mornings and meal prep.

Ingredients

Scale

½ cup rolled oats
½ cup milk of choice
1 tbsp chia seeds (optional)
1 tsp honey or maple syrup
⅓ cup fruit or yogurt (middle layer)
¼ cup topping: granola, nuts, fresh fruit

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Instructions

Mix oats, milk, chia, and sweetener. Let sit for 5–10 min.
Layer base into a mason jar.
Add middle layer of fruit, yogurt, or nut butter.
Top with crunchy ingredients before eating.
Refrigerate for 6+ hours. Enjoy cold!

Notes

Store in the fridge up to 5 days. Keep crunchy toppings separate if prepping ahead.

Prep Time: 10 minutes
Category: Breakfast
Method: No Cook
Cuisine: American

Nutrition

Serving Size: 1 jar
Calories: 280
Sugar: 7g
Sodium: 60mg
Fat: 9g
Saturated Fat: 1g
Unsaturated Fat: 6g
Trans Fat: 0g
Carbohydrates: 38g
Fiber: 6g
Protein: 8g
Cholesterol: 2mg