Blueberry Sour Cream Muffins with Crunchy Streusel Topping

Sweet bursts of fresh blueberry, an ultra-moist crumb from sour cream, and a buttery, crunchy streusel combine to make Blueberry Sour Cream Muffins with Streusel Topping — a perfect way to begin the day.

These muffins come together quickly and deliver big flavor. Sour cream in the batter keeps them tender and moist while adding a subtle tang that complements the juicy blueberries. Topped with a sweet-salty, buttery streusel, each bite has a pleasant contrast of soft muffin and crisp crumble.

From mixing to the table in about 30 minutes, this recipe is ideal for an easy weekday breakfast or a relaxed weekend brunch.

I like recipes you can make any morning without fuss. This batter takes about 10 minutes to put together and bakes in roughly 20 minutes, so fresh muffins are ready in about half an hour.

How to make Blueberry Sour Cream Muffins with Streusel

Start by whisking eggs and sugar in a medium bowl until smooth. Add sour cream, oil, and vanilla and whisk to combine.

In a separate large bowl, stir together the dry ingredients: flour, baking powder, baking soda, and salt.

Combine the wet and dry ingredients, stirring just until the batter comes together, then gently fold in fresh blueberries. Fresh berries are preferred when available, but frozen can be used as noted below.

Use a 4-ounce ice cream scoop or a 1/4 cup measure to portion batter into a 12-cup muffin tin lined with papers or sprayed with cooking spray. Top each muffin with streusel before baking.

Can I use frozen blueberries and do I need to defrost them first?

Yes — frozen blueberries work well and do not need to be defrosted. If you use thawed berries, their juices may tint the batter purple, but the flavor remains excellent.

How to make the easy, homemade streusel

Streusel is a simple crumb topping made from flour, sugar, and butter. For these muffins, brown sugar and a pinch of cinnamon and salt enhance the blueberry flavor.

Make the streusel by cutting room-temperature butter into the flour, brown sugar, cinnamon, and salt until the mixture resembles coarse crumbs. If the butter is soft enough, you can use a fork instead of a pastry cutter.

Sprinkle 1–2 tablespoons of streusel over each muffin before baking. Bake, cool slightly, and enjoy.

These Blueberry Sour Cream Muffins with Streusel are best the day they’re baked and will keep well for 2–3 days stored in an airtight container at room temperature.

Tips for baking perfect muffins

• Don’t overmix the batter. Stir by hand and stop when ingredients are just combined to keep muffins tender and light.
• Fill each muffin cup about three-quarters full for proper rise and shape.
• A 4-ounce ice cream scoop or a 1/4-cup measuring cup portions batter consistently for standard-size muffins.