Triple Berry Oatmeal Muffins

Written by Beth - Budget Bytes

I don’t make muffins often, but when I do I want them to be big, fluffy, and totally epic like the ones you get at a bakery. And since these Triple Berry Oatmeal Muffins are apology muffins (to replace my boyfriend’s muffin that my dog ate), I needed to make sure they were on point. The muffin tops are big and delicious, they’re dotted with juicy berries, and even have a little oatmeal goodness mixed right in. These will be my go-to muffins in the future. And hopefully next time I’ll be making them just for fun, not as an apology.

One single oatmeal muffin on a white surface, title text at the top

Bakery Style Muffins with Just a Few Healthy Additions

I wanted to make these oatmeal muffins resemble the big delicious muffins that you buy from a bakery, but try to sneak in at least a little something healthy. I used King Arthur Flour’s basic muffin recipe, but subbed in rolled oats, as per their notes, and some frozen berries that I had stashed in my freezer. I was at the very end of my all-purpose flour, so I used a 1/4 cup whole wheat flour to make up for what I was missing. And hey, that’s more fiber! Lastly, I added a touch of cinnamon to the batter, and made a delicious cinnamon-oat crumble topping. Yaasssss.

What Kind of Oatmeal Can I Use?

I used old-fashioned rolled oats because that’s what I always have on hand and they have the most delicious hearty texture. You can probably get away with using quick oats, which are much thinner and flakier, but your muffins won’t have quite as much texture.

How to Freeze The Leftovers

If you don’t have a friend and a dog to help you eat the whole batch, oatmeal muffins freeze really well. Just make sure they are fully cooled before wrapping them tightly in plastic and then zipping them up in a freezer bag. The frozen muffins thaw fairly quickly at room temperature or can be reheated briefly in the microwave.

Several Triple Berry Oatmeal Muffins on a wire cooling rack

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4.78 from 22 votes

Triple Berry Oatmeal Muffins

These big, moist, and fluffy Triple Berry Oatmeal Muffins are a real treat for breakfast and boast the goodness of rolled oats. Freezer friendly! 
Prep Time: 15 mins
Cook Time: 20 mins
Total Time: 35 mins
Servings: 8 large muffins



  • 1 cup all-purpose flour ($0.19)
  • 1/4 cup whole wheat flour ($0.10)
  • 1 cup rolled oats ($0.26)
  • 1/4 cup brown sugar ($0.16)
  • 1/4 cup white sugar ($0.08)
  • 1/2 tsp salt ($0.02)
  • 1 Tbsp baking powder ($0.11)
  • 1/4 tsp cinnamon ($0.02)
  • 1 cup milk ($0.49)
  • 1/4 cup cooking oil ($0.16)
  • 2 large eggs ($0.75)
  • 1 cup frozen berries ($1.00)


  • 1/2 cup rolled oats ($0.13)
  • 2 Tbsp butter, cold ($0.28)
  • 2 Tbsp brown sugar ($0.08)
  • 1/4 tsp cinnamon ($0.02)


  • Prepare the oat crumble topping first, so it's ready to go on the muffins as soon as they're mixed. In a small bowl, combine the oats, butter, brown sugar, and cinnamon. Use your hands to massage the oats, brown sugar, and cinnamon, into the butter until it's evenly combined and clumpy. Refrigerate the mixture until you're ready to top the muffins.
  • Preheat the oven to 500ºF. In a large bowl, combine the all-purpose and whole wheat flours, oats, brown sugar, white sugar, salt, baking powder, and cinnamon. Stir well.
  • In a separate bowl, whisk together the milk, eggs, and oil.
  • Pour the whisked wet ingredients into the bowl with the dry ingredients. Stir just until they are combined, it doesn't need to be perfectly mixed. There may still be clumps and a few dry spots, but it's important to avoid over mixing.
  • Add the frozen berries to the mixture and gently fold in. Again, avoid over mixing because the berry juice will turn the muffins blueish grey.
  • Line eight muffin tin cups with paper liners, then fill each one to the top with the muffin batter (use more cups if needed, just make sure to fill to the top). Sprinkle the prepared oat crumble topping onto each muffin.
  • Transfer the muffin tin to the oven and immediately turn the heat down to 400ºF. Bake for 22-25 minutes, or until the muffins have risen into peaks, have cracked slightly, and are deep golden brown on top. Remove the muffins from the oven and the muffin tin (use a knife to loosen any parts that have spilled out over top) and allow them to cool.
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Serving: 1 ServingCalories: 320.54 kcalCarbohydrates: 45.18 gProtein: 7.06 gFat: 13.69 gSodium: 359.94 mgFiber: 3.08 g
Nutritional values are estimates only. See our full nutrition disclaimer here.

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Scroll down for the step by step photos!

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Overhead view of Oatmeal Muffins on the wire cooling rack

How to Make Berry Oatmeal Muffins – Step by Step Photos

Oat Crumble Topping Ingredients in a glass bowl

Make the oat crumble topping first so that it’s ready to go later. In a small bow, combine 1/2 cup rolled oats, 2 Tbsp chilled butter, 2 Tbsp brown sugar, and 1/4 tsp cinnamon.

Oat Crumble Topping mixed together

Massage the ingredients into the butter until it forms a well mixed “crumble” texture. Refrigerate the topping until it’s ready to go on the muffins.

Dry ingredients for muffin batter in a glass bowl with wooden spoon

Begin preheating the oven to 500 degrees. In a large bowl, combine 1 cup all-purpose flour, 1/4 cup whole wheat flour, 1 cup rolled oats, 1/4 cup brown sugar, 1/4 cup white sugar, 1/2 tsp salt, 1 Tbsp baking powder, and 1/4 tsp cinnamon. Mix these dry ingredients together really well.

Wet ingredients in a glass bowl with a whisk

In a separate bow, whisk together 2 large eggs, 1 cup milk, and 1/4 cup vegetable or canola oil. Whisk until smooth.

Wet ingredients being poured into bowl of dry ingredients

Pour the wet ingredients into the bowl of dry ingredients.

Lightly Mixed Muffin Batter in a glass bowl with a wooden spoon

Stir the two together JUST until they’re combined. It’s really important not to over mix here, so it’s okay if it’s lumpy and there are a couple dry spots left. You’ll stir just a bit more after adding the berries.

Frozen berries folded into muffin batter

Add one cup frozen berries and gently fold them into the batter. Don’t stir too much because they’ll turn the batter blue. Also, keeping them frozen until you stir them in helps prevent the juice from spreading and turning the batter blue.

Muffin tin filled with batter and topped with crumble

Line about eight cups of a muffin tin with paper, then fill each one to the top with the muffin batter. Usually you only fill the cups of a muffin tin 3/4 full, but if you want a nice big crown on the muffin like they have at the bakeries, fill them to the top. Finally, top the muffins with the oat crumble mixture.

Unbaked muffins viewed from the side

Here’s the side view for reference, so you can see how full they are. Transfer the muffin tin to the oven, turn the heat down to 400, then let them bake for 22-25 minutes.

Baked muffins viewed from the side in the muffin tin

Or until they’ve risen into nice rounded muffins, the tops have just a couple cracks, and they’re deeply golden brown. YUM. Remove them from the muffin tin to let them cool. It helps to use a knife to gently loosen the muffins where they’ve spilled over top.

One Triple Berry Oatmeal Muffin on a white surface with the paper peeled back

And then once they’re coooool, peel and enjoy!

A half eaten Triple Berry Oatmeal Muffin on a plate


My dog Zoe giving eyes to the camera

“Don’t even think about it, Zoe!”

“You mean you didn’t bake those muffins for me?”


Triple Berry Oat Muffins -