If you love waking up to a ready-made breakfast that tastes amazing, you need to try large batch banana walnut overnight oats. This recipe lets you make multiple servings at once, saving you time on busy mornings all week long. With creamy oats, sweet banana, and crunchy walnuts, every bite is filling and delicious.

Meal prepping breakfast does not have to be boring or complicated. This recipe comes together in just minutes the night before, and you wake up to something that feels like a treat. It is perfect for families, meal preppers, or anyone who wants a healthy breakfast without the morning rush.

Prep Time: 10 minutes | Chill Time: 8 hours (overnight) | Servings: 6 | Estimated Calories: 340 per serving

Why You’ll Love This Recipe

  • Make it once, eat all week: This large batch recipe gives you six servings so you are set from Monday through the weekend.
  • No cooking required: Just stir, refrigerate, and enjoy. The oats soften overnight on their own.
  • Naturally sweet: Ripe bananas add natural sweetness so you do not need much added sugar.
  • Packed with nutrients: Walnuts bring healthy fats and protein, while oats offer fiber to keep you full longer.
  • Kid-friendly: The banana flavor makes this a hit with kids and picky eaters of all ages.
  • Fully customizable: You can swap ingredients based on what you have at home or what your family likes.

Ingredients

Here is everything you need to make six servings of large batch banana walnut overnight oats. Most of these are pantry staples you probably already have.

  • 3 cups old-fashioned rolled oats (do not use instant oats, they get too mushy)
  • 3 cups milk of your choice (dairy milk works great, or swap for almond, oat, or soy milk)
  • 1 cup plain Greek yogurt (sub with dairy-free yogurt or skip it and add extra milk)
  • 3 ripe bananas, mashed (the riper the better for natural sweetness)
  • 3 tablespoons chia seeds (these help thicken the oats and add omega-3s)
  • 3 tablespoons maple syrup or honey (adjust to your sweetness preference, or leave it out if your bananas are very ripe)
  • 1 1/2 teaspoons vanilla extract (adds a warm, cozy flavor)
  • 1 1/2 teaspoons cinnamon (sub with pumpkin pie spice for a fun twist)
  • 3/4 cup chopped walnuts (pecans or almonds work great as a swap)
  • Pinch of salt (brings all the flavors together)

Optional toppings: sliced fresh banana, extra walnut pieces, a drizzle of honey, or a sprinkle of granola for added crunch.

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How to Make Large Batch Banana Walnut Overnight Oats

  1. Mash the bananas. In a large mixing bowl, peel and mash all three bananas with a fork until they are mostly smooth. A few small lumps are totally fine and add great texture.
  2. Mix the wet ingredients. Add the milk, Greek yogurt, maple syrup, and vanilla extract to the mashed bananas. Stir everything together until well combined.
  3. Add the dry ingredients. Pour in the rolled oats, chia seeds, cinnamon, and salt. Stir the mixture thoroughly so everything is evenly distributed throughout the bowl.
  4. Fold in the walnuts. Gently stir in the chopped walnuts. Save a handful to use as toppings if you like a little extra crunch in the morning.
  5. Divide into containers. Spoon the mixture evenly into six individual jars or airtight containers. Mason jars work perfectly for this because they seal tight and are easy to grab and go.
  6. Seal and refrigerate overnight. Put the lids on all the containers and place them in the refrigerator for at least 8 hours or overnight. The oats will absorb the liquid and thicken into a creamy, pudding-like texture.
  7. Serve and enjoy. In the morning, give each jar a good stir. Add your favorite toppings like fresh banana slices or a drizzle of honey. Enjoy cold straight from the fridge, or warm it up in the microwave for 1 to 2 minutes if you prefer it warm.

Pro Tips for Perfect Large Batch Banana Walnut Overnight Oats

Use very ripe bananas. Bananas with lots of brown spots on the peel are sweeter and mash more easily. They also blend better into the oats for a more consistent banana flavor in every bite.

Do not skip the chia seeds. They might seem optional, but chia seeds are what give overnight oats their thick, creamy texture. Without them, the oats can turn out watery and thin.

Stir before serving. After sitting overnight, the liquid can settle a bit. Always give your jar a good stir in the morning before you eat to redistribute everything evenly.

Add toppings fresh each morning. Toppings like fresh banana slices or granola are best added right before eating. If you add them the night before, they can become soggy by morning.

Adjust the consistency to your liking. If your oats are too thick in the morning, just splash in a little more milk and stir. If they are too thin, add a bit more chia seeds and let them sit for another 30 minutes.

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Use a large container for mixing. When making a big batch, use a bowl that is bigger than you think you need. This makes it much easier to stir everything together without spills.

Flavor Variations

Once you love the base recipe, try these fun twists to keep breakfast interesting throughout the week.

  • Banana Chocolate Chip: Stir in 1/4 cup mini chocolate chips for a dessert-like treat that still feels totally acceptable at breakfast.
  • Banana Peanut Butter: Add 3 tablespoons of peanut butter or almond butter to the mix for extra protein and a rich, nutty flavor.
  • Tropical Banana: Swap the walnuts for toasted coconut flakes and add a handful of dried pineapple for a tropical vacation vibe.
  • Banana Berry: Mix in a cup of fresh or frozen blueberries or strawberries along with the walnuts for a fruity, colorful twist.
  • Banana Espresso: Stir in one teaspoon of instant espresso powder for a coffee-banana combo that will wake you right up.
  • Banana Pumpkin Spice: Replace the cinnamon with 1 1/2 teaspoons of pumpkin pie spice for a cozy fall-inspired flavor.

Storage Tips

Proper storage is key when making a large batch so your oats stay fresh and tasty all week.

Refrigerator storage: Keep all jars sealed tightly in the refrigerator. They stay fresh and delicious for up to 5 days. This makes them perfect for prepping on Sunday and eating through Friday.

Freezer storage: You can freeze individual portions in freezer-safe containers for up to 3 months. Thaw overnight in the fridge and stir well before eating. Note that the texture may be slightly softer after freezing, but the flavor is still great.

Best containers to use: Wide-mouth mason jars are the top choice because they are easy to stir in and seal well. Any airtight container works though, including glass meal prep containers or BPA-free plastic jars.

Keep toppings separate: Store crunchy toppings like extra walnuts or granola in a small separate bag or container. Add them each morning so they stay crispy and do not get soggy.

Nutrition Information

Here is the estimated nutrition per serving based on the recipe as written. Exact values may vary depending on the specific brands and ingredients you use.

  • Calories: 340
  • Protein: 13g
  • Carbohydrates: 46g
  • Fat: 12g
  • Fiber: 6g
  • Sugar: 14g (mostly natural from banana and maple syrup)
  • Calcium: 15% of daily recommended value
  • Iron: 10% of daily recommended value

This recipe is a great source of complex carbohydrates for sustained energy and heart-healthy fats from the walnuts. The combination of fiber and protein helps keep you satisfied until lunch without reaching for a mid-morning snack.

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Frequently Asked Questions

Can I make large batch banana walnut overnight oats without yogurt?

Yes, absolutely. Simply replace the yogurt with an equal amount of extra milk. The oats will be slightly less thick and creamy, but they will still taste great. You can also use a dairy-free yogurt alternative if you prefer.

How long do overnight oats last in the fridge?

When stored in a sealed airtight container, overnight oats last up to 5 days in the refrigerator. Making a large batch at the start of the week means you have grab-and-go breakfasts ready every single morning without any extra effort.

Can I eat overnight oats warm instead of cold?

Yes! While overnight oats are typically eaten cold, you can warm them up easily. Remove the lid and microwave the jar for 1 to 2 minutes, stirring halfway through. Add a splash of milk before warming to prevent them from drying out.

What kind of oats work best for this recipe?

Old-fashioned rolled oats are the best choice. They absorb liquid well overnight and give you a satisfying chewy texture. Instant oats will become too mushy and steel-cut oats will stay too firm even after soaking all night.

Can I use frozen bananas in this recipe?

Yes, frozen bananas work well and are often even sweeter than fresh ones. Thaw them completely before mashing so they blend smoothly into the mixture. This is a great way to use bananas that are overripe and sitting in your freezer.

Start Your Week Right with This Easy Recipe

There you have it, everything you need to make a delicious batch of large batch banana walnut overnight oats that will power you through the whole week. This recipe is simple, budget-friendly, and genuinely tasty enough to look forward to every morning.

Once you get into the habit of prepping these on Sunday night, you will wonder how you ever got through the week without them. Feel free to mix up the flavors and toppings to keep things fun and fresh.

We would love to hear how your batch turns out! Leave a comment below and let us know your favorite variation. And if you found this recipe helpful, share it with a friend who could use an easier morning routine.