Brownie Batter Overnight Oats Recipe for Chocolate Lovers

Brownie Batter Overnight Oats served in mason jars on wooden board surrounded by chocolate chips and chopped walnuts with two spoons

Overnight oats are my effortless, go-to breakfast — simple to prepare, portable, and endlessly adaptable. These Brownie Batter Overnight Oats give you that rich, chocolatey brownie flavor in a wholesome, make-ahead breakfast. They’re made with rolled oats, cacao, chocolate protein powder, nut butter, and a scattering of dark chocolate chips and chopped walnuts. They come together in minutes and chill overnight for a creamy, satisfying morning meal.

Whether you’re packing breakfasts for a trip, skipping a grocery run, or just need a fast, filling option for busy mornings, these overnight oats are ideal. They’re also great for meal prep and keep well in the fridge for several days.

ingredients for Brownie Overnight Oats on wooden board

What You Need to Make Brownie Batter Overnight Oats

These brownie-style overnight oats use pantry-friendly ingredients and come together quickly. Swap in your preferred brands or dairy-free alternatives as needed.

Bob's Red Mill Organic Old Fashioned Rolled Oats bag on board with dark chocolate chips and oats and cacao powder

Ingredients (for 2 servings):

  • 1 cup rolled oats (old-fashioned)
  • 2 tsp chia seeds
  • 2 tbsp chocolate protein powder
  • 1¼ cups unsweetened almond milk (or milk of choice)
  • 2 tbsp raw cacao powder
  • 1 tbsp pure maple syrup
  • 1 tbsp nut butter (optional—for extra creaminess)
  • 2 tbsp vegan dark chocolate chips
  • 2 tbsp chopped walnuts (optional)

For serving (optional): vegan chocolate chips, extra chopped walnuts, or your favorite granola for crunch.

oats and chia seeds in mason jar on wooden board with dark chocolate chips and oats scattered with a spoon

How to Make Brownie Batter Overnight Oats

Preparing these overnight oats is as easy as stirring everything together and letting it rest in the fridge. Here’s the straightforward method:

cacao powder and chocolate protein powder in mason jar with oats and dark chocolate chips scattered

  1. Add oats, chia seeds, chocolate protein powder, cacao powder, almond milk, maple syrup, and nut butter to a mason jar or airtight container. Stir well so the powders are fully incorporated and the mixture looks even.
  2. Seal the jar and refrigerate overnight (or at least 4–6 hours). The oats and chia will absorb the liquid and soften, creating a creamy, spoonable texture.

In the morning, stir the oats and adjust the thickness. If they’re too thick, add a splash of almond milk. If too thin, fold in a little extra chia or protein powder. Top with dark chocolate chips and chopped walnuts and enjoy chilled.

brownie batter overnight oats in mason jar on wooden board with oats and dark chocolate chips scattered

About the Oats

I like using sturdy old-fashioned rolled oats for overnight oats because they soften nicely but keep enough texture to be interesting. Soaking them overnight yields a creamy consistency without turning mushy. Using a protein powder and chia seeds boosts protein and fiber, keeping you full until lunch.

brownie batter overnight oats mixed in mason jar on wooden board with dark chocolate chips and walnuts mixed in with spoon

Notes on Meal Prep

This recipe makes two servings but scales easily. Double or triple the quantities to prepare breakfasts for the whole week. Stored in airtight jars or containers, these overnight oats will keep in the refrigerator for up to seven days.

For best texture, store crunchy toppings such as walnuts or granola separately and add them right before serving so they stay crisp.

brownie batter overnight oats mixed in mason jar with spoon and walnuts and dark chocolate chips scattered

How to Serve Brownie Batter Overnight Oats

  • Divide the chilled oats into two bowls or jars.
  • Adjust consistency with a splash more almond milk if needed.
  • Top with dark chocolate chips, chopped walnuts, and/or a sprinkle of granola for crunch.
  • Serve cold and enjoy — or take one on the go.

brownie batter overnight oats mixed in jar with spoon on the side

More Overnight Oats Ideas

Try other flavor combinations for variety: Purple Sweet Potato Overnight Oats, Peanut Butter & No-Jelly Overnight Oats, Apple Pie Overnight Oats, Blueberry Protein Overnight Oats, Coconut Carrot Cake Overnight Oats, Chocolate Cherry Overnight Oats, Key Lime Pie Overnight Oats, Oatmeal Raisin SunButter Overnight Oats, Red Velvet Overnight Oats, Maple Tahini Overnight Oats, Peanut Butter Pumpkin Overnight Oats, or Strawberry Cheesecake Overnight Oats.

Brownie Batter Overnight Oats served in mason jars on wooden board surrounded by chocolate chips and chopped walnuts with two spoons

I Want to Hear From You

If you try this Brownie Batter Overnight Oats recipe, I’d love to hear how you like it. Leave a comment or rating if you enjoyed it, and feel free to share your variations — different nut butters, protein powders, or mix-ins can all change the flavor and texture in fun ways.

Happy prepping — enjoy the creamy, chocolatey breakfast!

XO Lauren

Brownie Batter Overnight Oats served in mason jars on wooden board surrounded by chocolate chips and chopped walnuts with two spoons

Brownie Batter Overnight Oats thumbnail

Brownie Batter Overnight Oats

  • Total Time: 5 minutes (plus chilling)
  • Yield: 2 servings
  • Diet: Vegan (can be adapted)

Description

Rich, chocolatey overnight oats that taste like brownie batter — made with cacao, chocolate protein powder, walnuts, and dark chocolate chips. Great for meal prep.

Ingredients

  • 1 cup rolled oats
  • 2 tsp chia seeds
  • 2 tbsp chocolate protein powder
  • 1¼ cups unsweetened almond milk
  • 2 tbsp raw cacao powder
  • 1 tbsp pure maple syrup
  • 1 tbsp nut butter (optional)
  • 2 tbsp vegan dark chocolate chips
  • 2 tbsp chopped walnuts (optional)

Instructions

  1. Combine oats, chia, protein powder, cacao, almond milk, maple syrup, and nut butter in a jar. Stir to combine, seal, and refrigerate overnight.
  2. Next morning, divide into servings, adjust consistency with more milk if needed, and top with chocolate chips and walnuts. Store leftovers in the fridge up to 7 days.

Details

  • Prep Time: 5 mins
  • Cook Time: 0 mins
  • Category: Breakfast, Meal Prep
  • Method: Hand-mix
  • Cuisine: Vegan, Gluten-Free option, Refined-Sugar-Free option

This post was originally created in partnership with a brand, and the recipe and writing are provided here to help you make a delicious, easy breakfast. Enjoy!