Streusel Blueberry Loaf is a moist blueberry quick bread with a thick buttery cinnamon streusel on top. It’s the kind of loaf I like to keep on the counter for easy slices that feel a little special.
The crumb is soft and tender from sour cream (or Greek yogurt), and the blueberries stay juicy instead of sinking into a gummy layer. I also like a little lemon zest in the batter to keep the flavor bright, especially when the berries are very sweet.
For me, this is best as a weekend breakfast or an afternoon snack with something warm to drink. It also holds up well on a brunch table because you can slice it cleanly once it’s cooled.
Why You’ll Love This Recipe
Big crumb topping: The streusel bakes into a thick, crunchy layer that’s actually worth making. It’s buttery, cinnamon-y, and not skimpy.
Moist loaf: Sour cream (or Greek yogurt) keeps the bread tender for days, not dry and crumbly.
Blueberries in every slice: Tossing the berries with a little flour helps keep them suspended so you don’t end up with a purple bottom.
Simple ingredients: Nothing fancy here, just pantry basics plus blueberries. It’s an easy bake when you want a reliable loaf.
Optional lemon glaze: The glaze is quick, and it adds a bright finish that’s really nice with the cinnamon topping.
Ingredients You’ll Need
Streusel Topping
- All-purpose flour: I use regular flour here; it’s what gives the topping that classic crumbly texture.
- Light brown sugar: This adds a deeper sweetness and helps the streusel clump. Dark brown sugar works too if that’s what you have.
- Ground cinnamon: Cinnamon is the main flavor in the topping, so use one you actually like the taste of.
- Salt: Don’t skip it. A small amount keeps the topping from tasting flat.
- Unsalted butter: Melted butter makes the streusel quick to mix and gives you bigger, chunkier crumbs.
- Pecans (optional): I like the crunch, but you can leave them out or swap in walnuts if you prefer.
Loaf Batter
- All-purpose flour: Standard flour is perfect here. Measure it the way you normally do, but don’t pack it down.
- Baking powder: This is the main lift for the loaf, so make sure yours isn’t expired.
- Baking soda: Just a little, to work with the sour cream/yogurt and help the crumb bake up nicely.
- Salt: A quick bread needs salt to taste like anything other than sugar and flour.
- Unsalted butter: Softened butter creams better and gives the loaf a richer flavor than oil, in my opinion.
- Granulated sugar: Keeps the crumb light and gives the loaf that classic sweet quick bread taste.
- Eggs: Use large eggs, and let them come to room temp if you can. They mix in smoother.
- Vanilla extract: I keep it simple with vanilla here. It rounds out the lemon and blueberry nicely.
- Sour cream or Greek yogurt: This is the moisture in the loaf and what makes it stay tender. Full-fat works best, but lower-fat will still work.
- Milk: Just enough to loosen the batter so it spreads easily in the pan.
- Lemon zest (optional): I like it when I want a more “lemon-blueberry” vibe. You can skip it if you want a straight blueberry loaf.
Blueberries
- Fresh blueberries: Fresh is great here, but frozen works too as long as you keep them frozen until you fold them in.
- All-purpose flour: Coating the berries helps keep them from dropping straight to the bottom while the loaf bakes.
Optional Glaze
- Powdered sugar: This gives you an easy glaze that sets up nicely once the loaf cools.
- Lemon juice: Adds a little tang and makes the sweetness taste cleaner.
- Milk: Use it to thin the glaze to a drizzle-able consistency. Add a tiny splash at a time.
Recipe Instructions
- Preheat the oven: Heat the oven to 350°F. Grease a 9×5-inch loaf pan, then line it with parchment paper (I like a little overhang so it lifts out easily).
- Mix the streusel: In a bowl, whisk the flour, brown sugar, cinnamon, and salt. Stir in the melted butter until large crumbs form, then refrigerate while you make the batter.
- Mix the dry ingredients: In a medium bowl, whisk the flour, baking powder, baking soda, and salt together. Set aside.
- Cream the butter and sugar: In a large bowl, beat the softened butter and granulated sugar until light and creamy.
- Add the eggs and vanilla: Beat in the eggs one at a time, then mix in the vanilla until combined.
- Mix the sour cream and milk: Stir the sour cream (or Greek yogurt) and milk together. If you’re using lemon zest, mix it in here.
- Add the dry ingredients: Add the dry ingredients in two additions, alternating with the sour cream mixture, mixing just until you don’t see dry flour.
- Coat the blueberries: Toss the blueberries with the flour until they’re lightly coated.
- Fold in the blueberries: Gently fold the coated blueberries into the batter.
- Layer the batter and streusel: Spread half the batter in the pan, then sprinkle over half the streusel. Add the remaining batter and top with the rest of the streusel.
- Bake: Bake for 55 to 70 minutes, until a tester comes out clean or with a few moist crumbs. If the top is browning too quickly, tent the loaf loosely with foil for the last 15 to 20 minutes.
- Cool: Cool the loaf in the pan for 15 minutes, then lift it out and cool completely on a rack before slicing.
- Add the glaze: Whisk the powdered sugar, lemon juice, and milk until smooth, then drizzle over the cooled loaf if you want the extra finish.
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 ingredients. Butter, eggs, and sour cream mix together more evenly, and the batter ends up smoother. It’s a small thing, but it really helps the crumb.
Don’t overmix once the flour goes in. Mix just until the batter looks combined. Overmixing is the fastest way to get a heavier, tighter loaf.
Keep frozen blueberries frozen. Don’t thaw them first or they’ll streak the batter and add extra moisture. Toss them with flour and fold them in straight from the freezer.
Tent with foil if the streusel browns early. The topping can get dark before the center is done, especially in hotter ovens. A loose foil tent fixes it.
Let it cool completely for clean slices. This loaf cuts much nicer once it’s fully cooled, especially with all that crumb topping on top.
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 tea: This is really good with plain black coffee or an Earl Grey. The cinnamon topping tastes extra nice with a hot drink.
- Greek yogurt: If you want to make it feel more like breakfast, serve a slice with a scoop of yogurt on the side. A little honey on the yogurt is good too.
- Fresh berries: A small bowl of extra blueberries or mixed berries keeps the plate simple. It’s nice if you’re serving this at brunch.
- Butter: I usually don’t need it because the loaf is moist, but a thin swipe of salted butter is good if you’re serving it slightly warm.
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 loaf covered at room temperature for 2 to 3 days. I usually keep it under a cake dome or wrapped well so the streusel doesn’t dry out.
If you prefer, you can store it covered in the fridge for up to 5 days. The topping will soften a bit in the fridge, but the loaf stays moist.
For longer storage, freeze individual slices or freeze the whole loaf wrapped tightly. Thaw at room temperature or thaw in the fridge overnight, then warm slices briefly if you like.
If you’re glazing, I usually wait and glaze right before serving so it stays looking neat. You can still glaze ahead, but it soaks in more as it sits.
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 use frozen blueberries?
Yes. Use them straight from the freezer (don’t thaw), toss with the flour, and fold them in gently. You may need to add a few extra minutes to the bake time.
How do I know when the loaf is done?
I look for a tester to come out clean or with a few moist crumbs, not wet batter. If you hit blueberries with the tester, try again in a different spot closer to the center.
Can I make this without the pecans?
Absolutely. Leave them out and the streusel still bakes up crisp and crumbly. If you want a little crunch without nuts, a little extra streusel on top is never a problem.
Can I swap the sour cream for Greek yogurt?
Yes, Greek yogurt works well here and gives a similar tang and moisture. I prefer plain, unsweetened yogurt.
Why did my streusel sink into the loaf?
This can happen if the batter is overmixed or the streusel crumbs are very small and sandy. Refrigerating the streusel helps, and I like leaving some bigger chunks so it stays more on top.
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
Streusel Blueberry Loaf
INGREDIENTS
Streusel Topping
- 1 2/3 cups all purpose flour
- 2/3 cup light brown sugar
- 1 tsp ground cinnamon
- 1/4 tsp salt
- 6 tbsp unsalted butter melted
- 1/2 cup chopped pecans optional.
Loaf Batter
- 1 3/4 cups all purpose flour
- 2 tsp baking powder
- 1/4 tsp baking soda
- 1/2 tsp salt
- 1/2 cup unsalted butter softened
- 3/4 cup granulated sugar
- 2 large eggs
- 2 tsp vanilla extract
- 1 cup sour cream or Greek yogurt
- 2 tbsp milk
- 1 tbsp lemon zest optional.
Blueberries
- 1 1/2 cups fresh blueberries
- 1 tbsp all purpose flour.
Optional Glaze
- 1/2 cup powdered sugar
- 1 tbsp lemon juice
- 1 tbsp milk.
INSTRUCTIONS
Prep
- Preheat oven to 350 F and grease a 9x5 inch loaf pan then line with parchment
- whisk streusel flour brown sugar cinnamon and salt then stir in melted butter until large crumbs form and refrigerate.
Batter and Bake
- Whisk flour baking powder baking soda and salt
- cream butter and sugar until light then beat in eggs one at a time and mix in vanilla
- mix sour cream and milk then add dry ingredients in two additions alternating with sour cream mixture just until combined
- toss blueberries with 1 tbsp flour and fold into batter
- spread half the batter in pan then sprinkle on half the streusel then add remaining batter and top with remaining streusel
- bake until a tester comes out clean or with a few moist crumbs 55 to 70 minutes and tent with foil if the top browns too quickly
- cool 15 minutes in pan then transfer to a rack to cool completely
- whisk glaze ingredients and drizzle over cooled loaf if using.
