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    Home » Breakfast and Brunch » Baked Peanut Butter Oatmeal

    Baked Peanut Butter Oatmeal

    Published: Aug 27, 2022 · Modified: Feb 16, 2023 by Alexandra Cook

    For the full recipe including quantities and method, click the "jump to recipe" button, or scroll through and read our helpful tips along the way.

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    My Baked Peanut Butter Oatmeal is the perfect start to the day. Containing just seven ingredients, this recipe is so easy to make that it’s suitable for busy weekdays. The oatmeal is moist and slightly chewy. This is the ideal recipe for meal prep – make a batch today!

    White rectangular dish of baked peanut butter oatmeal, cut into six pieces topped, with peanut butter yoghurt.
    Jump to:
    • Why you’ll love this recipe:
    • Ingredients in this recipe:
    • How to Make Peanut Butter Baked Oatmeal:
    • Tips for success and FAQs:
    • Variations and substitutions:
    • Serving suggestions:
    • More delicious recipes for you to try:
    • Baked Peanut Butter Oatmeal
    Star

    Why you’ll love this recipe:

    Baked Peanut Butter Oatmeal is one of my favourite breakfasts. It is so easy to prepare and very satisfying.

    I like to make it ahead of time and store it in the fridge – it is delicious cold, but I also like to reheat it and top it with my peanut butter yoghurt. So delicious!

    You will love this Baked Peanut Butter Oatmeal because:

    • This is a great recipe for getting started on your meal prep. For busy weekday mornings, it is a great advantage to have breakfast ready to go.
    • The recipe is freezer friendly.
    • You just need a few simple ingredients, all of which are readily available at the supermarket.
    • It is an easily made, healthy breakfast that is egg-free, refined sugar-free and vegan. Use certified gluten-free oats if required.
    • There is no culinary skill required – the ingredients are mixed, added to an ovenproof dish and baked.
    • It is a perfect dish for sharing or for a brunch party. Just make it ahead of time and reheat when ready to serve.
    • Baking the oats in the oven is a great, hands-off way to prepare oatmeal.

    Ingredients in this recipe:

    Please see the recipe card further along in the post for exact quantities of ingredients and the full method.

    Ingredients in this recipe on a white marble background.

    Peanut Butter – for the best flavour, use natural unsweetened peanut butter. Smooth or crunchy works well in this recipe.

    Milk – use milk of your preference. I like to use almond or oat milk, but soy milk works just fine. You can use dairy milk if you don’t need the oats to be vegan.

    Maple Syrup – we use a small amount to sweeten the oatmeal. If you prefer more sweetness, you could add extra maple syrup when serving.

    Oats – use old-fashioned Rolled Oats for this recipe. They are a budget-friendly whole grain, complex carbohydrate and a good source of dietary fibre.

    Chia seeds – use black or white. These little seeds are a nutritional powerhouse being a complete protein, a good source of omega-3 fatty acids as well as being rich in dietary fibre.

    Baking powder – is a raising agent which helps lift and lighten the oatmeal. 

    Salt – a little sea salt helps to enhance the flavours.

    Greek yoghurt – optional, for serving. We make a peanut butter yoghurt to top the oatmeal with. You can use coconut yoghurt or another dairy-free alternative to keep the recipe vegan if needed.

    Coconut oil – to lightly grease the baking dish.

    How to Make Peanut Butter Baked Oatmeal:

    Please see the recipe card further along in the post for exact quantities of ingredients and the full method.

    Steps 1-2 of preparing this recipe - the dry ingredients in one bowl and mixing the wet ingredients in another bowl.

    1 – Combine the dry ingredients:
    In a large bowl, add the rolled oats, chia seeds, sea salt and baking powder and mix well to combine.

    2 – Combine the wet ingredients:
    In a separate bowl, add the milk, maple syrup and peanut butter and whisk until smooth.

    Steps 3-4 of preparing this recipe - combining the wet and dry ingredients and the mixture in the baking dish ready for oven.

    3 – Combine the wet and dry ingredients:
    Combine the wet and dry ingredients and mix well.

    4 – Add to your baking dish:
    Add the mixture to your greased baking dish.

    Bake for 35 minutes until lightly golden and set.

    Remove from the oven, and rest for 10 minutes before serving. 

    Steps 5-6 of preparing this recipe - ingredients for peanut butter yoghurt in a bowl and the mixture stirred ready to serve.

    5 – Make the peanut butter yoghurt:
    Add the peanut butter, Greek yoghurt and maple syrup to a bowl.

    6 – Mix until smooth:
    Whisk until the mixture is well combined and smooth and creamy.

    White rectangular dish of baked oatmeal, with one piece missing.

    Tips for success and FAQs:

    This delicious Baked Peanut Butter Oatmeal is such a great way to begin the day.

    It has a moist, slightly chewy texture; it’s almost like eating cake for breakfast – but healthy!

    How do I keep the Baked Peanut Butter Oatmeal moist?

    It is important not to overcook the oats, or they will become dry. Bake until it feels just set in the centre and is pulling away slightly from the edges. However, if you prefer more moisture, you can add some extra milk or yoghurt when serving.

    Can I prepare them the night before and bake them in the morning?

    Yes, you can. Prepare the recipe as per the instructions – except for adding the baking powder – cover the bowl of oat mixture with clingfilm and place in the fridge for 8 hours. Add the baking powder and stir well before putting the mixture in your greased baking dish. The texture of the oats will be a little softer, but delicious all the same.

    How long can I keep them?

    Store the Baked Peanut Butter Oatmeal in the fridge in an airtight container for up to 4 days. Reheat them as described below.

    Can they be frozen?

    Yes, when cool, cut them into 6 bars. If storing in layers, place them in an airtight container with a sheet of non-stick baking paper between them so they do not stick together. If you want to remove individual bars, you could wrap each one in cling wrap and then in foil or an airtight container to prevent freezer burn. Store for up to 3 months. Be sure to label and date them as frozen items can be difficult to identify. Take them out of the freezer the night before you want them and put them in the fridge to thaw. Reheat as below.

    What is the best way to reheat the Baked Peanut Butter Oatmeal?

    Put the Baked Oatmeal breakfast bars on a baking tray or ovenproof plate, cover loosely with a sheet of baking paper and then foil. You can cover directly with foil if you wish, but I use the baking paper to prevent the aluminium foil from touching the food. Place them into a preheated 180 degrees C (355 F) oven and heat for 15 – 20 minutes or until warmed through. Remove the foil for about the last 5 minutes.

    Are Old-Fashioned Rolled Oats Gluten-Free?

    There are different rules regarding this, depending on where you live in the world. For Australian residents, Coeliac Australia provides a great resource on this topic. Always be sure to read the labels and consult with a health professional if you are unsure.

    Star

    Variations and substitutions:

    Chocolate chips – would be a great addition. You could also melt some dark chocolate and drizzle when serving.
     
    Cinnamon – a little cinnamon is also delicious.
     
    Milk – You can use dairy if you don’t want the oats to be vegan.

    Banana – slices of banana are delicious with the warm oatmeal. 

    Slice of baked peanut butter oatmeal, topped with peanut butter yoghurt, on a small round white plate.

    Serving suggestions:

    Enjoy the Baked Peanut Butter Oatmeal as it is, or add toppings to suit your taste.

    For this recipe, I like to use a topping of peanut butter yoghurt, which I make by whisking Greek yoghurt, peanut butter and maple syrup together. You can also use coconut yoghurt to keep the oats vegan.

    You could also try:

    • Slices of banana.
    • Fresh berries or other fruit of your choice.
    • Some roasted peanuts for great texture.

    This Baked Peanut Butter Oatmeal is so easy to make, nourishing and perfect for meal prep. For easy breakfasts, keep some in the fridge or store some in the freezer. This is a breakfast for the whole family to enjoy.

    Be sure to let me know in the comments below when you have tried them!

    Alex xx

    More delicious recipes for you to try:

    • White rectangular dish of baked apple oatmeal, cut into six pieces and topped with yoghurt and apple slices.
      Baked Apple Cinnamon Oatmeal
    • Piece of baked banana oatmeal on a round white plate, topped with some yoghurt, a slice of banana and cinnamon.
      Baked Banana Oatmeal
    • White rectangular dish of baked strawberry oatmeal, cut into six pieces.
      Baked Strawberry Oatmeal
    • Small round white plate, with piece of oatmeal, with a spoon of yoghurt and half strawberry on top, and fork on edge of plate.
      Baked Chocolate Oatmeal

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    White rectangular dish of baked peanut butter oatmeal, cut into six pieces topped, with peanut butter yoghurt.

    Baked Peanut Butter Oatmeal

    My Baked Peanut Butter Oatmeal is the perfect start to the day. Containing just six ingredients, this recipe is so easy to make that it’s suitable for busy weekdays. This is the ideal recipe for meal prep – make a batch today!
    4.98 from 44 votes
    Print Pin Review
    Course: Breakfast, Snack
    Cuisine: International
    Prep Time: 10 minutes
    Cook Time: 35 minutes
    Total Time: 45 minutes
    Servings: 6 people
    Calories: 454kcal
    Author: Alexandra Cook – It’s Not Complicated Recipes

    Ingredients

    • ½ cup peanut butter See Note 1
    • 2 ¼ cups (560 ml) oat milk – dairy, soy or nut milk can be used. See Note 2
    • ⅓ cup (80 ml) maple syrup
    • 2 ¼ cups (180 g) old-fashioned rolled oats
    • 1 ½ tablespoon chia seeds See Note 3
    • ½ teaspoon sea salt
    • 1 teaspoon baking powder
    • coconut oil – for greasing the baking dish.

    Peanut Butter Yoghurt: (optional)

    • 1 cup Greek yoghurt
    • ¼ cup peanut butter
    • 2 teaspoon maple syrup

    Recipe Measurements:

    For accuracy, we recommend weighing your ingredients. This will produce the best results.

    Prevent your screen from going dark

    Instructions

    • Preheat your oven to 180 degrees C (355 F).
    • Lightly grease an 8 x 10 inch (20 x 25 cm) baking dish with coconut oil. 
    • In a large bowl, add the rolled oats, chia seeds, baking powder and salt. Mix well.
    • In a separate bowl, add the peanut butter, maple syrup and milk. Whisk well until smooth.
    • Combine both the wet and dry ingredients and mix well.
    • Pour the mixture into your baking dish.
    • Bake for approximately 35 minutes, until the mixture is set and lightly golden brown. 
      Remove from the oven, and rest for 10 minutes before serving.
    • For the peanut butter yoghurt, simply combine the ingredients in a small bowl and whisk until smooth and creamy.
    • Serve with additional milk and syrup if you wish, or enjoy as is or with the peanut butter yoghurt.

    Notes

    1. Peanut butter: use good quality natural peanut butter. Smooth or crunchy both work fine in this recipe.
    2. Milk: use milk of your choice. I use almond or oat milk. Add more milk when serving if you prefer a thinner texture.
    3. Tablespoon: we use a standard Australian tablespoon which is 20 ml (4 teaspoons).
    4. Nutritional information: is based on the oatmeal being divided into six serves and served with ⅙th of the peanut butter yoghurt.

    Nutrition Estimate:

    Calories: 454kcal | Carbohydrates: 53g | Protein: 17g | Fat: 21g | Saturated Fat: 4g | Polyunsaturated Fat: 5g | Monounsaturated Fat: 9g | Trans Fat: 0.01g | Cholesterol: 2mg | Sodium: 395mg | Potassium: 461mg | Fiber: 6g | Sugar: 24g | Calcium: 275mg | Iron: 3mg
    Tried this Recipe? Please rate and leave a comment!
    Nutritional Disclaimer:

    The nutritional information is an estimate only, and is derived from online calculators. For accurate results, we recommend calculating the nutritional information based on the ingredients and brands you use.

    « Chocolate Almond Flour Cookies (Gluten-Free)
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    122 shares

    Reader Interactions

    Comments

    1. tianna

      November 04, 2022 at 10:33 am

      5 stars
      sounds delicious, cannot wait to try it

      Reply
      • Alexandra

        November 07, 2022 at 4:21 pm

        Hi Tianna, I am so pleased that you like the recipe for the Baked Peanut Butter Oatmeal and plan to make it yourself. I do hope that you enjoy it. 🙂

        Reply
    2. Karen

      September 22, 2022 at 10:47 am

      5 stars
      I am obsessed with peanut butter and obsessed with baked oatmeal, so I was super excited when I found this and really enjoyed it! I love how indulgent it tastes even though it is pretty healthy! Great recipe! Will make again soon.

      Reply
      • Alexandra

        September 27, 2022 at 7:00 pm

        Hi Karen, thank you so much for your fantastic feedback on the Baked Peanut Butter Oatmeal. I am so pleased that you enjoy it and appreciate that you took the time to let me know. 🙂

        Reply
    3. Nancy

      September 10, 2022 at 5:29 am

      5 stars
      Obsessed with this PB recipe. I’m making them again tonight

      Reply
      • Alexandra

        September 10, 2022 at 11:13 am

        Hi Nancy, I am so pleased that you enjoy the Baked Peanut Butter Oatmeal. Thank you for letting me know. 🙂

        Reply
    4. Dianne

      September 06, 2022 at 11:33 am

      5 stars
      Fantastic recipe! If you’re a fan of peanut butter, you’re going to love this recipe! I highly recommend it. My kids have asked me to make this for them every weekend now.

      Reply
      • Alexandra

        September 10, 2022 at 11:32 am

        Hi Dianne, thank you for your feedback on the Baked Peanut Butter Oatmeal. I am delighted to hear that your children enjoy it. 🙂

        Reply

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    Hello!

    I’m Alex.

    I am a full-time blogger, passionate foodie and writer who loves to travel.

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