Blueberry Butter Swim Biscuits

Name: Blueberry Butter Swim Biscuits
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: American
Ingredients: ½ cup melted butter; 2 ½ cups all-purpose flour; ¼ cup sugar; 1 tablespoon baking powder; ½ teaspoon salt; 1 ¾ cups buttermilk (see notes for substitution); 1 ½ cups fresh blueberries; 1 cup powdered sugar; ½ teaspoon vanilla extract; 1 ½ tablespoons milk, or more as needed

Recipe by Sam Rivera · Updated July 2025

Bread & Sourdough

There's something magical about pulling a pan of golden, butter-kissed biscuits from the oven, especially when they're studded with juicy blueberries and drizzled with a sweet vanilla glaze. Home cooks adore this recipe for its simplicity, versatility, and irresistible aroma that fills the kitchen. Perfect for lazy weekend brunches, holiday morning gatherings, or even a quick treat to brighten any day, these biscuits are a crowd-pleaser that feels indulgent without being fussy. The combination of tender dough, burst blueberries, and rich glaze makes every bite worth savoring.

What Makes This Recipe Special

The 'swim' technique uses melted butter in the baking dish, creating a luxurious, almost cake-like layer beneath the biscuits as they bake.
Fresh blueberries are folded directly into the dough for pockets of juicy sweetness, rather than just sprinkled on top.
The glaze is made with powdered sugar and milk, but it's added *after* baking to keep the biscuits tender and prevent sogginess.
Buttermilk is key for both flavor and tenderness, but the recipe includes a note for substitution to accommodate dietary needs.

⏱ 40 mins

American

Servings 9

Ingredients

½ cupmelted butter

2 ½ cupsall-purpose flour

¼ cupsugar

1 tablespoonbaking powder

½ teaspoonsalt

1 ¾ cupsbuttermilk (see notes for substitution)

1 ½ cupsfresh blueberries

1 cuppowdered sugar

½ teaspoonvanilla extract

1 ½ tablespoonsmilk, or more as needed

Nutrition

335 caloriesCalories

Per serving · Values are estimates

Instructions

Preheat your oven to 450°F. Pour the melted butter into the bottom of a 9-inch baking dish and set aside.

In a large bowl, whisk together the flour, sugar, baking powder, and salt until well combined.

Gradually pour in the buttermilk while gently stirring the mixture. Stir just until combined; the dough will be sticky and slightly lumpy. Avoid overmixing.

Gently fold in the fresh blueberries, ensuring even distribution throughout the dough without crushing them.

Pour the dough into the baking dish over the melted butter. Evenly spread and smooth the dough with a spatula. Using a sharp knife, score the dough into 9 squares by making two cuts down each side.

Bake the biscuits in the preheated oven for 25-30 minutes, or until the tops are golden brown and a toothpick inserted into the center comes out clean.

While the biscuits bake, whisk together powdered sugar, vanilla extract, and 1 ½ tablespoons milk in a small bowl. Add more milk a teaspoon at a time until the glaze reaches your desired consistency.

Once the biscuits are done baking, let them cool for a few minutes. Drizzle the glaze over the warm biscuits.

Cut or pull apart the biscuits and serve warm.

Essential Tips

Chill the Buttermilk

If your buttermilk is cold straight from the fridge, let it sit at room temperature for 10-15 minutes before using. This helps the dough rise more evenly and prevents a dense texture.

Gentle Folding Only

When incorporating blueberries into the dough, use a spatula and fold just until they're evenly distributed. Overmixing can turn the berries into purée, turning your biscuits purple and altering the texture.

Score Before Baking

Use a sharp knife to score the dough into squares or rectangles before baking. This makes it easier to pull apart the biscuits after baking without tearing.

Glaze Timing is Key

Let the biscuits cool for at least 5 minutes after baking before drizzling the glaze. If it's too hot, the glaze will melt and slide right off, leaving you with bare biscuits.

Butter the Spatula

When smoothing the dough in the baking dish, lightly butter your spatula to prevent sticking and ensure an even layer. This small step makes a big difference in presentation.

Smart Swaps & Variations

Lemon Blueberry Add 1 tablespoon of lemon zest and 1 teaspoon of lemon extract to the dough for a bright, citrusy twist that pairs beautifully with the blueberries.

Gluten-Free Substitute all-purpose flour with a 1:1 gluten-free baking flour blend (like King Arthur or Bob's Red Mill) and use gluten-free buttermilk alternative.

Vegan Replace buttermilk with homemade vegan buttermilk (1 ¾ cups unsweetened almond milk + 1 ¾ tablespoons lemon juice or vinegar) and use melted coconut oil instead of butter.

Browned Butter Brown the butter before adding it to the baking dish for a nutty, caramelized flavor that elevates the entire dish.

Extra Cheesy Fold in ½ cup of shredded sharp cheddar cheese into the dough for a savory-sweet combination that's perfect for breakfast or brunch.

What to Serve With This

A steaming cup of hot coffee or chai tea to balance the sweetness of the biscuits.
Whipped cream or vanilla ice cream for an indulgent dessert-style serving.
Fresh strawberries or raspberries for a vibrant fruit medley on the side.
Crispy bacon or sausage links for a hearty, balanced breakfast spread.

Storage & Reheating

Storage

Store the biscuits in an airtight container at room temperature for up to 2 days. For longer storage, freeze the baked biscuits (without glaze) in a sealed bag for up to 1 month.

Reheating

Reheat the biscuits in a 350°F oven for 5-10 minutes until warmed through. For a quick fix, microwave individual biscuits for 10-15 seconds, but avoid overdoing it to prevent rubbery texture.

Expert Chef Tips

For extra-flaky biscuits, freeze the butter and grate it into the flour mixture using a box grater. This creates tiny, even pieces of butter that melt quickly, creating layers in the dough.
Use a bench scraper to divide the dough evenly in the baking dish. This tool ensures straight, clean cuts and consistent biscuit sizes for even baking.
If your blueberries are particularly juicy, toss them in 1 teaspoon of flour before folding them into the dough. This prevents them from sinking to the bottom during baking.

Equipment You’ll Need

9-inch baking dish (glass or ceramic preferred)
Mixing bowls (large and medium)
Whisk and spatula
Sharp knife or bench scraper for scoring

Nutritional Benefits

Each serving (1 biscuit with glaze) provides approximately 335 calories, with 12g of fat primarily from the butter and buttermilk.
These biscuits contain about 5g of protein per serving, mainly from the buttermilk and flour, making them a slightly more satisfying treat.
The recipe includes 15g of sugar per serving, with 8g coming from added sugars in the glaze. Fresh blueberries add natural sweetness and fiber.
One serving offers 1g of dietary fiber from the whole wheat flour and blueberries, contributing to digestive health.

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Frequently Asked Questions

Can I use frozen blueberries instead of fresh?

Yes, but be sure to toss them in 1 teaspoon of flour first to absorb excess moisture. Frozen blueberries can release more liquid, which may affect the dough's texture. Avoid thawing them completely before using.

What's the best way to substitute buttermilk?

If you don't have buttermilk, mix 1 ¾ cups of milk with 1 ¾ tablespoons of lemon juice or vinegar and let it sit for 5 minutes. This will mimic the tangy flavor and acidity of buttermilk, which is essential for tender biscuits.

Can I make the dough ahead of time?

Yes! Shape the dough into the baking dish, cover tightly with plastic wrap, and refrigerate for up to 12 hours. When ready to bake, let it sit at room temperature for 15 minutes before scoring and baking as directed.

Why are my biscuits dense instead of flaky?

Overmixing the dough is the most common cause. Stir just until the ingredients are combined, and avoid pressing the dough too firmly when smoothing it into the pan. The dough should look shaggy, not smooth.

Can I double the recipe?

Absolutely, but use a 9x13-inch baking dish instead of the 9-inch dish to avoid overcrowding. The bake time may increase by 5-10 minutes, so keep an eye on the biscuits as they brown.

What's the best way to freeze these biscuits?

Freeze the baked biscuits (without glaze) in a single layer on a baking sheet for 1 hour, then transfer them to an airtight container or bag. Store for up to 1 month. Reheat in the oven as directed.

Can I make the glaze ahead of time?

Yes! Prepare the glaze up to 24 hours in advance and store it in an airtight container at room temperature. Thin with a teaspoon of milk before drizzling to restore the right consistency.

How can I make the biscuits more flavorful?

Add ½ teaspoon of ground cinnamon or ¼ teaspoon of nutmeg to the dry ingredients for warmth. Alternatively, mix 1 tablespoon of honey into the glaze for extra depth of flavor.