Jumbo Blueberry Crumb Muffins are my go-to when I want a muffin that feels like it came from a real bakery case. They’re tall, generously topped, and the crumb layer is the kind that makes you pick up extra bits off the plate.
What I like most is the mix of soft, tender muffin and that cinnamon brown sugar crumb that bakes up thick and a little crunchy. The sour cream and buttermilk combo gives these a richer texture that I honestly prefer over plain milk muffins.
I make these when I want an easy weekend bake, or when I need something that works for brunch and still feels like a treat with afternoon coffee. They’re also a nice option when you want a homemade bake sale-style muffin without getting fussy.
Why You’ll Love This Recipe
Big bakery tops: The high heat at the start helps the muffins rise fast, so you get that nice domed top that looks like a jumbo bakery muffin.
Thick crumb topping: The cinnamon brown sugar crumb is piled on generously, and it bakes into real clumps instead of disappearing.
Tender texture: Buttermilk and sour cream keep the crumb soft and moist, even the next day.
Works with fresh or frozen berries: I use whatever I have. Frozen blueberries work great here without thawing.
Simple ingredients: Nothing unusual, and you can make the whole batch with one bowl for dry and one for wet.
Ingredients You’ll Need
Crumb Topping
- All-purpose flour: I use regular flour here. It gives the crumb topping structure so it stays clumpy instead of melting into the muffin.
- Light brown sugar: This is what gives that classic streusel flavor and a little chew. Dark brown sugar works too if that’s what you have.
- Granulated sugar: A little white sugar helps the topping crisp up and keeps it from tasting too heavy.
- Ground cinnamon: Just enough to make the topping smell like a coffee shop muffin. If your cinnamon is old and faint, it’s worth replacing.
- Unsalted butter: Cold butter is important here so you get chunky crumbs. If it’s soft, the topping can turn sandy.
- Salt: Don’t skip the pinch. It keeps the topping from tasting flat.
Muffin Batter
- All-purpose flour: Regular flour is perfect for a sturdy but tender muffin. I don’t recommend swapping in bread flour here.
- Granulated sugar: This sweetens the muffins and helps the tops brown nicely.
- Baking powder: The main lift for these muffins. Make sure it’s fresh, since jumbo muffins need the boost.
- Baking soda: Works with the buttermilk for extra rise and a lighter texture.
- Fine salt: A small amount makes the blueberry flavor pop more.
- Eggs: Room temperature eggs mix in smoother and help the batter come together without overmixing.
- Buttermilk: This gives a softer crumb than regular milk. If you only have milk, you can still make muffins, but the texture won’t be quite the same.
- Sour cream: This is my favorite part for texture. It makes the muffins feel richer and less cakey.
- Unsalted butter: Melted butter gives a classic muffin flavor. Let it cool a bit so it doesn’t warm up the batter too much.
- Vanilla extract: A little vanilla rounds out the flavor and makes the crumb topping taste even better.
- Blueberries: Fresh is great, but frozen works well too (no need to thaw). If your berries are extra juicy, expect a little more purple streaking.
- Flour (for tossing blueberries): This helps keep the berries from sinking as much and keeps the batter from getting too wet around them.
Optional Finish
- Coarse sugar: Totally optional, but I like the extra crunch on top. It also makes the muffins look a little more bakery-like.
Recipe Instructions
- Preheat the oven: Heat the oven to 425°F and line a jumbo muffin pan with 6 liners, or grease it well.
- Make the crumb topping: Mix the flour, light brown sugar, granulated sugar, cinnamon, and salt. Cut in the cold cubed butter until clumps form, then refrigerate while you make the batter.
- Mix the dry ingredients: Whisk the flour, sugar, baking powder, baking soda, and salt in a large bowl.
- Mix the wet ingredients: In a separate bowl, whisk the eggs, buttermilk, sour cream, melted cooled butter, and vanilla until smooth.
- Combine the batter: Fold the wet mixture into the dry ingredients just until combined. Stop as soon as you don’t see dry flour.
- Add the blueberries: Toss the blueberries with the flour, then fold them in gently so they don’t break up too much.
- Fill the pan: Divide the batter between the 6 wells, filling them to the top for jumbo muffins.
- Add the topping: Mound the chilled crumb topping generously over each muffin. Sprinkle coarse sugar on top if you’re using it.
- Bake: Bake for 5 minutes at 425°F, then reduce the oven temperature to 350°F and bake for 18 to 22 minutes, until the tops are set and a toothpick comes out clean or with a few moist crumbs.
- Cool: Cool the muffins in the pan for 10 minutes, then transfer to a rack to cool completely.
Some of my tips!
This is the part that really makes a difference. If you only read one section, make it this one because this is where I share the little trick that helps the recipe turn out so well.
Recipe Tips & Tricks
Use room temperature dairy and eggs. It mixes together faster and you’re less likely to overwork the batter trying to smooth it out. The muffins bake up more tender this way.
Don’t overmix the batter. Stir just until you don’t see dry flour, even if it looks a little lumpy. Overmixing is the quickest way to end up with dense muffins.
Keep the crumb topping cold. If it warms up, it can melt into the batter instead of staying in chunks. I refrigerate it while I finish the batter and fill the pan.
Use frozen blueberries straight from the freezer. Don’t thaw them first or they’ll bleed a lot and make the batter wetter. A little color streaking is normal either way.
Check the center, not just the topping. The crumb can look “done” before the muffin is fully baked. A toothpick should come out clean or with a few moist crumbs from the muffin part.
Make some touches!
There are plenty of easy ways to serve this depending on the occasion. Keep it simple, or add a few small touches to make it feel a little more special.
Serving Suggestions
- Coffee or espresso: These are really good with coffee, especially because the cinnamon crumb tastes like a little built-in coffee cake topping. I usually go with a latte or plain drip coffee.
- Yogurt: Serve a muffin with a bowl of plain or vanilla Greek yogurt on the side. It makes it feel more like a real breakfast.
- Fresh berries: A handful of fresh blueberries or strawberries on the plate is simple and nice. It also makes brunch look a little more put together.
- Butter: If you’re eating them the next day, a little salted butter on a sliced muffin is great. Especially if you warm it for a few seconds first.
Save it for later
This section covers how to store leftovers and what parts of the recipe you can prepare ahead of time.
Storage and Make Ahead
Store the muffins covered at room temperature for 2 days. I usually keep them in a container with a lid so the tops don’t dry out too fast.
For a longer hold, store them covered in the fridge for up to 5 days. The crumb topping will soften a bit in the fridge, but the muffins stay moist.
To warm them up, I like a quick microwave for 10 to 15 seconds, or a low oven until they’re just warm. The oven brings back a little crunch on the topping.
You can also freeze the baked muffins in an airtight container. Thaw at room temperature, then warm briefly if you want.
A few quick answers
This section covers a few extra details that may help before you head to the recipe card.
Recipe FAQs
Can I make these in a regular muffin tin?
Yes. You’ll get more muffins (usually 12 standard-size), and they’ll bake faster. Start with the same 5 minutes at 425°F, then drop to 350°F and check around 12 to 15 minutes.
Do I need buttermilk, or can I substitute something else?
Buttermilk gives the best texture here, but you can make a quick substitute with milk and a little lemon juice or vinegar. Let it sit for a few minutes, then use it like buttermilk.
How do I keep the blueberries from sinking?
Tossing them with flour helps, and a thicker batter helps too. Also, don’t overmix once the berries go in, because broken berries can make the batter looser in spots.
Why did my crumb topping melt into the muffins?
The topping is much more likely to melt in if the butter is too warm or the topping isn’t chilled. Keep the butter cold when you cut it in, and refrigerate the topping until you’re ready to use it.
How do I know when jumbo muffins are done?
The tops should look set and the centers shouldn’t jiggle. A toothpick inserted into the muffin part (not just the crumb) should come out clean or with a few moist crumbs.
You might also like
Before you go, take a look at a few other recipes below the recipe card. They use similar ingredients in a different way and are worth saving too.
MORE DINNER RECIPES TO TRY
Jumbo Blueberry Crumb Muffins
INGREDIENTS
Crumb Topping
- 3/4 cup all purpose flour
- 1/2 cup light brown sugar packed
- 1/4 cup granulated sugar
- 1 tsp ground cinnamon
- 6 tbsp unsalted butter cold and cubed
- pinch of salt.
Muffin Batter
- 2 cups all purpose flour
- 1 cup granulated sugar
- 2 tsp baking powder
- 1/2 tsp baking soda
- 1/2 tsp fine salt
- 2 large eggs room temperature
- 3/4 cup buttermilk room temperature
- 1/2 cup sour cream room temperature
- 1/2 cup unsalted butter melted and cooled
- 2 tsp vanilla extract
- 2 cups blueberries fresh or frozen
- 1 tbsp all purpose flour for tossing blueberries.
Optional Finish
- coarse sugar for topping.
INSTRUCTIONS
Prep and Crumb
- Heat oven to 425 F and line a jumbo muffin pan with 6 liners or grease well. Mix crumb topping flour brown sugar granulated sugar cinnamon and salt then cut in cold butter until clumps form and refrigerate.
Make Batter
- Whisk flour sugar baking powder baking soda and salt. Whisk eggs buttermilk sour cream melted butter and vanilla until smooth then fold into dry ingredients just until combined. Toss blueberries with 1 tbsp flour and fold in gently.
Bake and Cool
- Fill wells to the top for jumbo muffins and mound chilled crumb topping generously over each then add coarse sugar if using. Bake 5 minutes at 425 F then reduce to 350 F and bake 18 to 22 minutes until tops are set and a toothpick comes out clean or with a few moist crumbs. Cool 10 minutes in pan then transfer to a rack to cool completely.
