These Peach Blueberry Muffins taste like summer baked into an oversized bakery muffin. Sweet, juicy peaches melt into a rich, tender crumb while fresh blueberries create bright little bursts of flavor in every bite.

Butter and sour cream give these muffins their luxurious texture, while a generous sprinkle of coarse turbinado sugar creates those beautiful golden, slightly crunchy bakery-style tops. This is a large-batch batter designed to make 12 XXL muffins, perfect for brunch, summer gatherings, or freezing for later.

The key is keeping the batter thick and handling the fruit gently so those juicy peaches and blueberries stay suspended throughout the muffins instead of disappearing into the bottom.

Ingredients

For the Muffins

1 cup (227g) unsalted butter, softened
1½ cups (300g) granulated sugar
½ cup (100g) packed light brown sugar
4 large eggs, room temperature
1 cup (240g) full-fat sour cream, room temperature
2 teaspoons (10ml) pure vanilla extract
4 cups (480g) all-purpose flour
1 teaspoon (6g) fine salt
1½ tablespoons (18g) baking powder
½ cup (120ml) whole milk, room temperature
1 cup (about 150–170g) fresh blueberries
3–4 medium ripe but firm peaches, diced

For the Tops

2–3 tablespoons turbinado or coarse sparkling sugar

How to Make Peach Blueberry Muffins

Step 1 – Prepare the Oven & Pan

Preheat the oven to 350°F (175°C).

Line a 12-cup jumbo/XXL muffin pan with large paper liners.

If your muffin pan is smaller than XXL size, you'll have enough batter for more than 12 muffins and will need to adjust the baking time accordingly.

Step 2 – Prepare the Fruit

Wash the blueberries and dry them thoroughly.

Dice the peaches into approximately ½-inch pieces.

If the peaches are exceptionally juicy, place the diced fruit briefly on paper towels to absorb excess surface moisture.

There's no need to peel thin-skinned peaches unless you prefer them that way.

Step 3 – Cream the Butter & Sugars

Place the softened butter, granulated sugar, and brown sugar in the bowl of a stand mixer fitted with the paddle attachment.

Beat on medium-high speed for approximately 3–4 minutes, scraping down the bowl as necessary, until noticeably lighter and fluffy.

This step incorporates air into the butter and helps give these substantial muffins a lighter crumb.

Step 4 – Add the Eggs

Add the eggs one at a time, beating well after each addition.

Scrape down the bottom and sides of the bowl periodically so everything combines evenly.

Step 5 – Add Sour Cream & Vanilla

Add the sour cream and vanilla.

Mix on medium-low speed just until smooth and creamy.

Don't worry if the mixture looks slightly curdled at this point. It should come together once the flour is incorporated.

Step 6 – Combine the Dry Ingredients

In a separate bowl, whisk together:

Flour
Baking powder
Salt

Whisk thoroughly so the large amount of baking powder is evenly distributed.

Step 7 – Finish the Batter

With the mixer on low, add approximately one-third of the flour mixture.

Pour in half of the milk.

Continue alternating the flour mixture and milk, ending with the flour.

Mix only until the flour is almost incorporated.

Stop the mixer before the batter becomes completely smooth.

Finish the last few folds by hand with a rubber spatula.

The finished batter should be very thick and scoopable.

Step 8 – Fold in the Peaches & Blueberries

Add the diced peaches and blueberries.

Using a large rubber spatula, gently fold the fruit through the batter just until evenly distributed.

Avoid aggressive stirring, which can crush the blueberries and make the peaches release additional juice.

Fill the Muffin Pan

Divide the batter evenly among the 12 XXL muffin cups.

The cups should be generously filled to create substantial bakery-style muffins.

Smooth the tops very lightly without pressing the batter down.

If you'd like particularly attractive muffins, reserve a handful of blueberries and peach pieces and gently press them into the tops.

Sprinkle each muffin generously with turbinado sugar.

Bake

Bake at 350°F (175°C) for approximately 27–33 minutes.

Because these are XXL muffins, timing will depend on the exact size and depth of your muffin pan.

They're ready when:

the tops are risen and golden,
the centers spring back lightly when touched,
and a toothpick inserted into the muffin portion comes out clean or with a few moist crumbs.

If your toothpick goes directly through a peach or blueberry, it will naturally look wet, so test another spot.

Cool

Let the muffins cool in the pan for approximately 10 minutes.

Carefully transfer them to a wire rack.

They're wonderful slightly warm, but allowing them to cool for another 15–20 minutes gives the crumb time to set around all that juicy fruit.

Chef's Tips for Perfect Peach Blueberry Muffins

Choose ripe but firm peaches. Extremely soft peaches release too much liquid into the batter.
Dry the fruit well. Surface moisture can create gummy pockets around the fruit.
Use room-temperature dairy and eggs. They'll emulsify more easily with the creamed butter.
Cream the butter properly. Three to four minutes makes a difference in such a rich batter.
Add the eggs individually. Four eggs added at once can overwhelm the butter emulsion.
Don't overmix after adding flour. This is one of the most important rules for tender muffins.
Fold the fruit by hand. A stand mixer can easily crush blueberries and peaches.
Keep the batter thick. Thick batter helps suspend the fruit.
Use coarse sugar on top. Turbinado sugar provides the crunchy bakery-style finish.
Don't judge doneness from fruit juice on the toothpick. Test through an area of actual muffin crumb.

The Secret to Tender Bakery-Style Muffins

There are two important techniques working together here: creaming the butter and limiting gluten development.

Creaming softened butter with both sugars traps tiny pockets of air. Those pockets expand in the oven and help lighten what would otherwise be a very rich batter.

Once the flour goes in, however, the strategy changes.

At that point, mixing should be minimal. Too much mixing develops gluten and can turn a beautifully tender muffin into something noticeably tougher.

That's why it's better to stop the mixer while a few flour streaks remain and finish gently by hand.

The Secret to Adding Fresh Peaches

Peaches contain considerably more moisture than ingredients such as chocolate chips or nuts.

For these muffins, choose peaches that are fragrant and flavorful but still firm enough to dice cleanly.

After cutting them, blot away excessive juice before folding them into the batter.

Avoid adding all the juice collected on the cutting board. The goal is to put juicy pieces of peach inside the muffins without adding unnecessary free liquid to the batter.

Delicious Variations

Peach Cobbler Muffins

Add ½ teaspoon cinnamon to the batter and finish with a buttery brown sugar streusel instead of plain turbinado sugar.

Lemon Blueberry Peach

Add 1–2 tablespoons finely grated lemon zest with the sugar for a brighter summer flavor.

Almond Peach

Add ½ teaspoon almond extract along with the vanilla and sprinkle sliced almonds over the tops.

Blueberry Crumble

Replace the turbinado sugar with a classic flour-butter-brown sugar crumble.

White Chocolate Peach

Fold approximately ¾ cup white chocolate chips into the batter with the fruit.

Cinnamon Peach Pecan

Add 1 teaspoon cinnamon and approximately ¾ cup chopped toasted pecans.

What to Serve With Peach Blueberry Muffins

These oversized muffins are particularly good with:

Freshly brewed coffee
Iced coffee
Hot tea
Cold milk
Greek yogurt
Fresh berries
Sliced peaches
Softened salted butter
Honey butter

For summer brunch, serve them slightly warm alongside fresh fruit, yogurt, and coffee.

Make-Ahead Tips

The muffins can be baked one day before serving.

Once completely cool, store them tightly covered at room temperature overnight.

You can also prepare the dry ingredients ahead and keep them covered separately. Dice the peaches shortly before mixing the batter rather than leaving cut fruit overnight.

For the best rise, bake the batter soon after it's mixed rather than refrigerating the fully assembled batter for an extended period.

Storage

Room Temperature

Store completely cooled muffins in an airtight container for up to 2 days.

Because they contain plenty of fresh fruit, avoid leaving them at room temperature for an extended period in a particularly warm or humid kitchen.

Refrigerator

Refrigerate for up to 4–5 days.

Allow refrigerated muffins to come closer to room temperature before serving, or warm them briefly.

Freezer

Wrap completely cooled muffins individually and place them in a freezer-safe bag or container.

Freeze for up to 2 months.

Thaw overnight in the refrigerator or for several hours at room temperature.

How to Reheat

For that fresh-baked feeling, warm one muffin in the microwave for approximately 10–20 seconds.

You can also warm several muffins in a 300°F (150°C) oven for approximately 8–10 minutes.

Don't overheat them—the fruit already provides plenty of moisture, and prolonged reheating can make the crumb tough.

Notes

Makes 12 XXL/jumbo muffins.
This is a large recipe with a substantial amount of batter; a standard 12-cup muffin pan will produce more than 12 muffins.
The exact amount of peach will vary depending on fruit size. Aim for roughly 2–2½ cups diced peaches rather than forcing all four peaches into the batter if they're particularly large.
Full-fat sour cream produces the richest, most tender texture.
Whole milk is ideal, although 2% milk can be substituted.
Frozen blueberries can work in a pinch; add them while still frozen and fold minimally to reduce color bleeding.
If using frozen peaches, thaw and drain them very thoroughly before adding.
Don't overbake—the muffins should be fully set but still moist inside.
For the prettiest bakery-style finish, leave several bright blueberries and golden peach pieces visible on the domed tops, then finish with a generous sparkling layer of coarse turbinado sugar.

Perfect Peach Blueberry Muffins – Buttery, Juicy & Bakery-Style