Oatmeal Muffins

Oatmeal Muffins
⏱️ cook time 35 minutes
🍽️ servings 6
⚡ Difficulty easy

intro

Hearty, lightly sweet cinnamon oatmeal muffins with a tender crumb, perfect for quick grab-and-go breakfasts or snacking, with warm, nutty oat flavor.

Ingredients

Old-fashioned rolled oats 1.5 cups (135g)
All-purpose flour 1 cup (120g)
Packed light brown sugar 1/3 cup (65g)
Baking powder 2 teaspoons (8g)
Baking soda 1/2 teaspoon (3g)
Ground cinnamon 1 teaspoon (2g)
Fine sea salt 1/4 teaspoon (1g)
Whole milk 1 cup (240ml)
Large egg 1 unit (50g, room temperature)
Unsalted butter 4 tablespoons (57g, melted and cooled)
Pure vanilla extract 1 teaspoon (5ml)

Steps

1

Prep oven and tin

Preheat your oven to 400°F (200°C) with a rack positioned in the middle. Line a 12-cup standard muffin tin with paper liners, or lightly grease each cup with non-stick cooking spray or melted butter to prevent sticking.

Step 1
step1:Prep oven and tin
2

Combine dry ingredients

In a large mixing bowl, whisk together 1.5 cups (135g) old-fashioned rolled oats, 1 cup (120g) all-purpose flour, 1/3 cup (65g) packed light brown sugar, 2 teaspoons baking powder, 1/2 teaspoon baking soda, 1 teaspoon ground cinnamon, and 1/4 teaspoon fine sea salt until evenly combined, with no clumps of brown sugar remaining.

Step 2
step2:Combine dry ingredients
3

Whisk wet ingredients

In a separate medium mixing bowl, whisk together 1 cup (240ml) whole milk, 1 room-temperature beaten large egg, 4 tablespoons (57g) cooled melted unsalted butter, and 1 teaspoon vanilla extract until smooth and uniformly pale yellow, with no unincorporated egg streaks.

Step 3
step3:Whisk wet ingredients
4

Fold muffin batter

Pour the full wet ingredient mixture into the dry ingredient bowl. Use a rubber spatula to fold gently for 20-30 seconds, just until no dry flour pockets remain; do not overmix, as this creates tough muffins. The finished batter will be thick and slightly lumpy.

Step 4
step4:Fold muffin batter
5

Portion batter evenly

Use a 1/4-cup (60ml) cookie scoop or measuring cup to divide batter evenly between the 12 prepared muffin cups, filling each 2/3 full to leave room for rising. Tap the tin firmly on the counter 2-3 times to pop trapped large air bubbles.

Step 5
step5:Portion batter evenly
6

Bake until golden

Place the tin on the middle oven rack and bake for 18-20 minutes at 400°F (200°C). Test doneness by inserting a wooden toothpick into a center muffin; it should come out with 1-2 moist crumbs attached, not wet batter. Tops will be golden and spring back when lightly pressed.

Step 6
step6:Bake until golden
7

Cool and serve

Remove the tin from the oven and let muffins rest in the tin for 5 minutes, then transfer to a wire cooling rack for 10 additional minutes before serving.

Step 7
step7:Cool and serve

Tips

1.Avoid overmixing the batter: lumps are completely normal, and overstirring develops gluten in flour that leads to dense, tough muffins instead of tender, fluffy ones.
2.Customize your muffins by stirring 1/2 cup (75g) of add-ins like raisins, chopped walnuts, fresh blueberries, or chocolate chips into the dry ingredients before adding the wet mixture.
3.For easy meal prep, wrap fully cooled muffins individually in plastic wrap and freeze for up to 3 months; reheat a frozen muffin in the microwave for 30 seconds for a quick breakfast.

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Oatmeal Muffins:Frequently Asked Questions

1.Why do my cinnamon oatmeal muffins turn out dry instead of moist as described?
Great question! Dry muffins almost always stem from two easy-to-fix missteps: overmixing the batter (which builds tough gluten and locks out moisture) or overbaking. Mix only until dry ingredients like flour and oats are just incorporated—small lumps are totally fine—and pull muffins when a center toothpick has 1-2 moist crumbs attached, not completely clean.
2.Can I use instant or quick-cooking oats instead of old-fashioned rolled oats?
You can, but you’ll get a different texture and flavor than the recipe intends. Quick-cooking and instant oats are cut much finer, so they break down faster in batter for softer, less chewy muffins with muted nutty oat flavor. If you swap, cut any batter resting time in half, since finer oats absorb liquid far quicker than thick rolled oats.
3.Why do my muffins come out dense and flat instead of light and tender?
This issue almost always ties to expired leavening or overmixing. First, confirm your baking powder and baking soda are less than 6 months old—old leaveners lose their rising power surprisingly fast. Also, avoid overstirring, which pops the tiny air bubbles leaveners create, and only fill liners ⅔ full to give muffins room to rise evenly.
4.What’s the best way to store these muffins for quick grab-and-go breakfasts?
These muffins are ideal for meal prep! Let them cool completely after baking, then store in an airtight container at room temperature for up to 4 days, or freeze for up to 3 months. Thaw frozen muffins at room temp for 30 minutes, or warm for 15 seconds in the microwave for that fresh-baked, warm cinnamon flavor.

Comments (19)

2 days ago

OMG these muffins are SO good! I baked them last night for the kids’ before-school breakfast this week and they devoured two each before I even could pack them up for meal prep. The cinnamon flavor is perfect, not too overpowering, and they stay moist even after 3 days in an airtight container. Total game changer for our chaotic weekday mornings! 10/10

yesterday

Wait did you add any mix-ins? I’m thinking of throwing in some raisins or chopped walnuts for my crew!

yesterday

So happy your family loved them! Raisins or chopped walnuts make fantastic mix-ins — just fold in ½ cup right before scooping the batter into the muffin tins!

3 days ago

As someone who burns literally every baked good I try, I was shocked these turned out perfect first try! The cook time was spot on for my oven, they were so moist and not crumbly at all. My roommate already asked me to make another batch this weekend. Only thing I did wrong was forget to line my tin so a couple stuck, but that’s on me lol

2 days ago

That’s such a win for a first bake! Next time you can give the tin a quick spritz of nonstick spray even if you’re using liners, just to make sure nothing sticks. So glad you and your roommate enjoyed them!

yesterday

Made these for my office potluck yesterday and they were gone in 10 minutes flat. Multiple coworkers asked for the recipe, I sent them all the link. Perfect level of sweetness, not cloying like some store-bought muffins. Will absolutely be making these again for our next team breakfast

1 week ago

I swapped the all-purpose flour for a 1:1 gluten free baking blend and these still came out incredible! I was worried they’d be dry or have that weird GF texture, but they were just as moist as the regular version. My gluten-eating husband didn’t even notice the difference

5 days ago

Thanks for sharing that swap! So many readers ask about gluten free adaptations, and it’s awesome to hear the 1:1 blend works perfectly here. Love that your husband couldn’t tell the difference!

5 days ago

These are the perfect pairing for my morning latte! I added a tiny bit of extra cinnamon and a sprinkle of oat streusel on top before baking and *chef’s kiss*. My only tiny note is I wish they were a little sweeter, but that’s just personal preference — I’ll probably add a tablespoon more brown sugar next batch

3 days ago

I did the extra brown sugar trick last time I made them! It’s so good, I also added a handful of white chocolate chips for a little extra sweetness

3 days ago

The streusel topping sounds amazing! The brown sugar level is totally customizable, so adding an extra tablespoon is a perfect tweak to match your taste. White chocolate chips sound like a delicious add-in too!

2 weeks ago

I’ve been making oatmeal muffins for 40 years and this recipe is easily one of the best I’ve tried. The moisture level is perfect, no dry crumbs everywhere like so many newer recipes. I brought a batch to my bridge club and all the ladies asked for the recipe. Will be adding this to my regular rotation

1 week ago

Super easy to make in my tiny dorm kitchen with just a mixing bowl and a cheap muffin tin! I meal prepped a batch on Sunday and they lasted me all week for quick breakfasts between classes. Way cheaper and better for you than grabbing a muffin from the campus café every morning

5 days ago

Love that this works for dorm cooking! For anyone storing these for meal prep, keep them in an airtight container at room temp with a paper towel on top to absorb excess moisture, and they’ll stay soft all week long.

3 days ago

Made these for our neighborhood block party over the weekend and they were a total hit! I made mini muffins instead of regular size so people could grab them as a quick snack, and I even had neighbors knocking on my door the next day asking for the recipe. The cinnamon aroma while they bake is unreal, my whole house smelled amazing for hours

2 days ago

How long did you bake the mini muffins for? I want to make mini versions for my kid’s soccer snack this week!

yesterday

Mini muffins are such a great idea for parties! For mini size, cut the bake time down to 12-15 minutes, and test with a toothpick in the center to make sure they’re done. Hope the soccer team loves them!

2 weeks ago

Great base recipe! I added a chopped apple and a teaspoon of nutmeg to the batter and it turned out fantastic. The muffins were super moist, the apple added a nice little tart bite that balanced the cinnamon and sugar really well. Will definitely be experimenting with more mix-ins next time

5 days ago

Wait, is it normal for the batter to be really thick? I was worried I messed up the measurements because it wasn’t runny like other muffin batters I’ve made, but I baked them anyway and they turned out perfect! Just wanted to check so I don’t panic next time I make them

3 days ago

Great question! The oatmeal in the batter soaks up a lot of the liquid, so a thicker batter is totally normal for this recipe — you didn’t do anything wrong! That thickness is part of what keeps the muffins so moist after baking, no runny batter required.

1 week ago

I’m in charge of snacks for our weekly team meeting and these are now my go-to! They’re easy to make a big batch of, they travel well, and there’s never any left over. I’ve made them three times in the last month and people get excited when they see me walk in with the muffin tin. 10/10, zero notes

5 days ago

Do these freeze well? I want to make a double batch and freeze half for busy weeks

3 days ago

They freeze beautifully! Let them cool completely, then pop them in a freezer bag for up to 3 months. Just thaw them at room temp for 30 minutes or warm them in the microwave for 20 seconds when you’re ready to eat.

2 days ago

I made these with my 7 year old daughter this weekend for a fun rainy day activity and it was so easy for her to help with! She loved measuring out the oats and stirring the batter, and she was so proud when the muffins came out of the oven. We ate them warm with a little butter on top and it was the coziest snack ever

3 days ago

I swapped the dairy milk for oat milk and used coconut oil instead of butter to make these vegan, and they came out so good! I was worried the substitutions would mess up the texture, but they were still moist and had that perfect cinnamon flavor. Even my non-vegan friends loved them when I brought them to book club

2 days ago

Oh thank you for sharing the vegan swaps! I’ve been looking for a vegan muffin recipe that doesn’t turn out dry, I’m definitely trying this tonight!

1 week ago

These are good, but I found them a little bland for my taste? I followed the recipe exactly, but I think next time I’ll add more cinnamon, maybe a dash of vanilla extract, and some craisins to liven them up a bit. Cook time was perfect for my oven though, and they were definitely moist as advertised!

5 days ago

I added a teaspoon of vanilla when I made them and it was chef’s kiss! It adds that little extra something without being overpowering

3 days ago

Thanks for the honest feedback! Adding extra cinnamon, vanilla, or dried fruit is a great way to customize these to your taste preference — everyone’s perfect muffin is a little different, so feel free to tweak the flavors to what you love!

30 minutes ago

I’m not much of a baker but these were so straightforward! I didn’t have any quick oats so I used old fashioned oats that I pulsed a couple times in the blender, and it worked totally fine. Saved me a trip to the grocery store, and the muffins came out great. Will be making these again for sure

5 minutes ago

Just pulled a batch out of the oven and OMG, my entire apartment smells like a cinnamon roll factory! I ate one warm straight out of the tin and it was so fluffy and moist, not dense at all like other oatmeal muffins I’ve tried. I added white chocolate chips like I mentioned in another comment and it’s the best decision I’ve made all week

just now

White chocolate chips in these sound insane, I’m doing that on my next batch! How many chips did you add?

2 days ago

Finally got around to making these after seeing all the rave reviews, and y’all were not lying! I made a double batch, froze half like the tip I saw mentioned, and they’re perfect for quick breakfasts before work. I added a little cinnamon sugar sprinkle on top right when they came out of the oven for a little extra crunch, and it’s *so* good

yesterday

The cinnamon sugar sprinkle on top is genius! My kids go crazy for that crunchy topping on muffins, I’m stealing that idea

yesterday

That cinnamon sugar sprinkle trick is one of my all-time favorite hacks for making muffins feel extra special! So glad you loved the recipe and that the freezing tip worked out for your meal prep.

yesterday

Made the mini muffin version like I asked about earlier for my son’s soccer snack, and the kids devoured them! I baked them for 14 minutes like the tip said and they were perfect, no burnt edges, totally moist. Even the other coaches asked where I got the muffins, I told them it was this recipe. Total win!

2 hours ago

That makes me so happy to hear! Nothing beats a snack that the whole team (and coaches!) love. Thanks for coming back to share how they turned out.

1 week ago

I’ve tried three different cinnamon oatmeal muffin recipes online in the last month, and this is by far the best one. No weird dry spots, the cinnamon is balanced, and it’s easy enough to whip up even on days my arthritis is acting up, no fancy equipment needed. I’ll be sticking with this recipe from now on