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There is something undeniably fun about a colorful, creamy drink that feels like it came straight from a specialty soda shop. This Blue Raspberry Dirty Soda — often nicknamed the Blue Lagoon — is bright, fizzy, and perfectly smooth with that signature swirl of cream that makes dirty sodas so irresistible.
If you’re new to dirty sodas, be sure to read our complete guide explaining exactly what they are and why they’ve become so popular.
If you’re new to the trend, dirty sodas are a popular soda shop–inspired drink made by combining fizzy soda with flavored syrups and a splash of cream. The result is a smooth, refreshing treat that’s easy to customize at home.
Around here, dirty sodas have quickly become a favorite for movie nights, teen hangouts, and warm afternoons when everyone wants something a little extra special without much effort.
If you love these creamy soda shop–style drinks, be sure to try our Dirty Dr Pepper, the nostalgic Vanilla Creamsicle Dirty Soda, and the fruity Pink Lady Strawberry Dirty Soda. And if you’re planning a party, don’t miss our free Dirty Soda Bar Menu Printable to make hosting even easier.
For an even smoother finish, try topping with our Homemade Whipped Cream!
Why You’ll Love This Recipe
- Comes together in just minutes
- Bright, eye-catching color that feels party-ready
- Creamy without being overly heavy
- Easy to customize for sweetness
- Perfect for gatherings, birthdays, or DIY soda bars
- Much more affordable than specialty soda shops
Ingredients
You only need a few simple ingredients to create this vibrant dirty soda at home.
- Lemon-lime soda (such as Sprite)
- Blue raspberry syrup
- Coconut syrup
- Heavy cream
- Ice
Tip: You can use either blue raspberry or sour blue raspberry syrup depending on your sweetness preference. Traditional blue raspberry creates a smoother, candy-like flavor, while sour blue raspberry adds a slightly tangy kick that balances the cream beautifully.
Equipment Needed
Tall Drinking Glass – Gives the soda room to stay bubbly while showcasing the layered swirl.
Syrup Pump – Helps keep the flavor balanced and consistent without over-pouring.
Jigger or Small Measuring Cup – Useful for maintaining the ideal soda-to-cream ratio.
How to Make
The secret to a great dirty soda is building the drink in a way that preserves carbonation while allowing the flavors to blend smoothly.
Start with a tall glass filled generously with ice. Cold ingredients help the soda stay crisp and refreshing rather than diluted.
Pour the lemon-lime soda first to create the fizzy base. Adding the syrups next allows them to disperse evenly without flattening the bubbles.
Finish by slowly pouring the heavy cream over the top. As it cascades through the soda, it creates that signature marbled swirl while softening the bright fruit flavors with a smooth, velvety finish.
Give it a gentle stir just before serving to bring everything together without losing that lively sparkle.
This post may contain affiliate links. As an Amazon Associate, I earn from qualifying purchases.
PrintBlue Raspberry Dirty Soda (Blue Lagoon / Beach Bum)
This Blue Raspberry Dirty Soda is bright, creamy, and refreshingly fizzy — made with lemon-lime soda, blue raspberry syrup, coconut syrup, and a swirl of heavy cream. Inspired by classic soda shop flavors, this fun drink comes together in minutes and is perfect for parties, summer days, or whenever you want a colorful treat.
- Prep Time: 2 minutes
- Total Time: 2 minutes
- Yield: 1 serving
- Category: Beverage
- Cuisine: American
Ingredients
- 12 oz lemon-lime soda (such as Sprite), chilled
- 2 oz blue raspberry or sour blue raspberry syrup (about 2 pumps)
- 1 oz coconut syrup (about 1 pump)
- 2-3 oz heavy cream
- Ice
Instructions
- Fill a tall glass with ice.
- Pour the lemon-lime soda over the ice.
- Add the blue raspberry syrup and coconut syrup, gently stirring to combine.
- Slowly pour in the heavy cream to create the signature dirty soda swirl.
- Stir lightly if desired and serve immediately.
Notes
Use very cold soda to keep the drink crisp and bubbly.
Pour the cream last so it cascades through the soda without flattening the carbonation.
Adjust sweetness easily by reducing the syrup slightly if you prefer a lighter drink.
For the best presentation, serve in a clear glass to showcase the vibrant blue color and creamy swirl.
Tips for Success
- Use very cold soda for the best texture and fizz.
- Pour the cream last to maintain carbonation.
- Stir gently — overmixing can flatten the drink.
- Serve immediately for peak flavor and presentation.
Storage & Reheating
Store: Dirty sodas are best enjoyed right after making. Once mixed, the carbonation begins to fade.
Frequently Asked Questions
What does blue raspberry taste like?
Blue raspberry is sweet, slightly tart, and reminiscent of classic candy flavors — making it a perfect match for creamy additions.
Can I make this less sweet?
Absolutely. Reduce the syrup slightly or use sour blue raspberry syrup for a brighter, more balanced flavor.
Does coconut make the drink taste tropical?
The coconut syrup adds subtle depth rather than strong coconut flavor, helping round out the sweetness without overpowering the drink.
Can I set this up as part of a soda bar?
Yes! This flavor is especially popular for parties. Be sure to grab our Dirty Soda Bar Menu Printable to make setup simple and polished.
Variations & Serving Ideas
One of the best things about dirty sodas is how easily they adapt to different flavors and occasions.
Try these ideas:
- Add a squeeze of fresh lime for extra brightness
- Garnish with a lemon wedge for contrast
- Use half-and-half for a lighter finish
- Offer multiple syrup options when hosting
This drink is especially fun for:
- birthday parties
- baby showers
- summer cookouts
- teen gatherings
- DIY soda bars
Final Thoughts
Sometimes the simplest treats are the ones everyone remembers. This Blue Raspberry Dirty Soda is playful, refreshing, and just indulgent enough to feel special — yet easy enough to make anytime the craving strikes.
Keep these ingredients on hand, and you’re never more than a minute away from a soda shop–style drink right at home.
If you’re enjoying these fun drinks, be sure to explore our growing collection of dirty soda recipes, including Dirty Dr Pepper, Vanilla Creamsicle Dirty Soda, and Pink Lady Strawberry Dirty Soda.
If you make it please consider leaving a review. We love to see your posts! Tag us on Facebook, Instagram, or TikTok! @ourgratefulkitchen
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