High-Protein Overnight Oats (No Added Sugar, 5-Minute Prep)

Spend five minutes the night before, and a filling, high-protein overnight oats breakfast is waiting for you in the morning. These oats get their creaminess from Greek yogurt, their staying power from chia seeds, and all their sweetness from fruit, with no sugar, syrup or honey added. Each jar has about 22g of protein.

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Recipe at a Glance

• Prep time: 5 minutes
• Chill time: at least 6 hours (or overnight)
• Servings: 1 jar
• Protein: about 22g per jar
• Added sugar: none
• Diet: vegetarian

Why You’ll Love These Overnight Oats

• High in protein: Greek yogurt, milk, chia seeds and almonds add up to about 22g of protein per jar.
• No added sugar: Mashed banana and fresh berries do all the sweetening.
• Keeps you full: Oats and chia are rich in fiber, so this breakfast carries you to lunch.
• Meal-prep friendly: Make 3–4 jars at once and breakfast is sorted for most of the week.

Ingredients (1 jar or bowl)

• 1/2 cup rolled oats
• 1/2 cup plain Greek yogurt
• 1/2 cup milk (dairy or unsweetened plant milk)
• 1 tbsp chia seeds
• 1/2 ripe banana, mashed
• 1/4 tsp cinnamon (optional)

Toppings

• 1/3 cup fresh berries (strawberries and blueberries)
• A few banana slices
• 1 tbsp sliced almonds
• Fresh mint leaves (optional)

How to Make High-Protein Overnight Oats

1. In a jar, bowl or container, mash the banana with a fork.
2. Add the oats, Greek yogurt, milk, chia seeds and cinnamon. Stir well until no dry oats remain.
3. Cover and refrigerate for at least 6 hours, or overnight.
4. In the morning, give it a stir and add a splash of milk if it’s too thick.
5. Top with berries, banana slices, sliced almonds and a few mint leaves just before serving.

Tips for Creamy Overnight Oats

• Use rolled oats: They soften into a creamy texture without turning mushy.
• Stir the chia well: Chia seeds clump if they sit in one spot. Stir again after 5 minutes if you can.
• Riper banana, sweeter oats: A banana with brown spots gives the most natural sweetness.
• Top in the morning: Fresh toppings stay bright, and the almonds stay crunchy.

Easy Variations

• Chocolate: Stir in 1 tbsp unsweetened cocoa powder.
• Peanut butter: Swirl in 1 tbsp natural peanut butter (check the label for no added sugar).
• Extra protein: Add 1 scoop of unflavored or unsweetened protein powder and an extra splash of milk.

Storage

• Fridge: Keep sealed jars for up to 4 days.
• Toppings: Add them on the day you eat each jar so they stay fresh.

Nutrition (Estimated, Per Jar with Toppings)

• Calories: about 475 kcal
• Protein: about 22g
• Carbohydrates: about 62g
• Fat: about 15g
• Fiber: about 11g
• Added sugar: 0g

Nutrition is an estimate based on 2% Greek yogurt and 2% milk and will vary with the brands you use.

Frequently Asked Questions

How long do overnight oats keep?
Up to 4 days in a sealed container in the fridge. Add the toppings on the day you eat them so they stay fresh and the almonds stay crunchy.

Can I use quick oats or steel-cut oats?
Rolled oats work best. Quick oats turn mushy, and steel-cut oats stay too chewy without cooking.

Can I eat them warm?
Yes. Microwave for 1–2 minutes, stirring halfway, and add the toppings after heating.

Can I make them dairy-free?
Yes. Use an unsweetened plant-based yogurt and plant milk. Choose a soy or pea-protein yogurt to keep the protein high.