Sonic Dirty Diet Coke Recipe (Easy Copycat Version)

Welcome to the wonderful world of dirty sodas, where ordinary soft drinks are transformed into extraordinary treats with just a few simple additions. Sonic’s Dirty Diet Coke is the granddaddy of all dirty sodas, a refreshing phenomenon that has taken social media by storm and changed how we think about elevated beverages. This isn’t just diet cola with mix-ins. It’s a carefully crafted combination of flavors that creates something new and surprisingly sophisticated. The magic happens when diet cola meets coconut syrup, homemade sweet cream, and a bright squeeze of lime, resulting in a guilt-free indulgence that satisfies both your sweet tooth and your health-conscious mind.

Copycat sonic dirty diet coke garnished with lime.

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What is a Dirty Diet Coke from Sonic?

The Dirty Diet Coke may be the granddaddy of all dirty sodas. It’s simple in concept, but one sip, and you’ll wonder why you haven’t tried it before. Combining diet cola, sweet cream, coconut-flavored syrup, and a squeeze of lime transforms an ordinary soda can into something refreshingly unique.

This version takes things to the next level with its reduced sugar and calorie Diet Sweet Cream. Sonic Dirty Diet Coke may be the ultimate beverage for those who want to feel like they are treating themselves without guilt about overindulging. 

Sonic Dirty Diet Coke recipe ingredients and why they are important

For the Diet Sweet Cream, you’ll need:

  • Splenda – sweetens the cream without adding calories to keep the drink diet-friendly. 
  • Vanilla extract – gives the Diet Sweet Cream its vanilla flavor. 
  • Half-and-half – is the main ingredient for the Diet Sweet Cream. Using half-and-half instead of cream reduces the fat content. 

For mixing up a Dirty Diet Soda, you’ll need:

  • Ice – pulls triple-duty here by cooling down the drink, masking some of the flavor of the artificial sweeteners, and slowing down the loss of carbonation. 
  • Diet Coke – the base of the drink provides the flavor of Coca-Cola without the calories. 
  • Sugar-free coconut syrup – gives the Dirty Diet Coke Sonic a wonderfully distinctive tropical flavor without the sugar of regular coconut syrup.
  • Diet sweet cream (see recipe above) – turns the drink into a classic dirty soda with its creamy flavor while avoiding much of the fat and calories of the original sweet cream used in the non-diet variety. 
  • Lime wedge – provides a citrus tang that balances the sweet cream and brightens the drink. 

Jordan’s Skinny Mixes Sugar Free Syrup, Coconut Flavor is a popular option, but you can use any brand. 

Copycat sonic dirty diet coke ingredients on a marble surface.

How to make a Dirty Diet Coke Sonic style

To prepare the Diet Sweet Cream:

  1. In a small mixing bowl with a spout, combine a package of Splenda, a quarter teaspoon of vanilla extract, and a cup of half-and-half. The measurements are enough to make 24 servings, so you may want to reduce the amounts. 
  2. Whisk just until the Splenda dissolves. You don’t want the half-and-half to thicken—you are not trying to make whipped cream here. 
  3. Store the Diet Sweet Cream in an airtight container in the fridge until you need it. Remember to shake well before using. 

To mix up a Dirty Diet Coke Sonic style:

  1. Fill three-quarters of a tall glass with ice. Pebble or crushed ice is best, but regular ice cubes will work, too. 
  2. Add two tablespoons of the diet coconut syrup.
  3. Pour Diet Coke into the glass, leaving about an inch from the top. 
  4. Stir gently with a long-handled spoon.
  5. Float two teaspoons of cream on top by pouring it slowly over the back of a spoon. 
  6. Garnish with a wedge of lime on the rim of the glass and serve immediately. 
Making copycat sonic dirty diet coke.
A glass of copycat sonic dirty diet coke.

What to serve with a Dirty Diet Coke

While you need nothing else to enjoy sipping on a Sonic Dirty Diet Coke, why not pair it with some of your favorite food? Below are a few suggestions for you to try. 

Crumbl Sugar Cookies. While dirty soda shops may have sugar cookies on their menus, few can compare with the rich, decadent flavor of a Crumbl Sugar Cookie. These oversized pink-frosted cookies have a massive following for their fantastic flavor and perfect texture, but they are priced at a premium. The good news is you can save money by recreating these addictive treats at home. 

Sonic Double Smash Burgers. Great smash burgers are an art form. Being able to consistently get the perfect ratio of crust to juiciness can take a bit of practice, but this Sonic Double Smash Burger copycat recipe is a great place to start. Besides, with the Sonic Smash Sauce, pickle chips, sliced onions, and American cheese on a soft potato bun, no one will be complaining if you don’t get the patties perfect. 

Dairy Queen Onion Rings. When you aren’t hungry enough for a full meal, but still want a snack to nibble on, it’s tough to beat these Onion Rings inspired by Dairy Queen. These lightly battered onion rings let the flavor of the onions come through. However, they are still extra crispy thanks to a clever secret! The coating is a mix of cornmeal and cracker crumbs! One bite, and you’ll never make ordinary wet batter onion rings again!

Copycat sonic dirty diet coke in a tall glass.
Copycat sonic dirty diet coke garnished with lime.

Sonic Dirty Diet Coke

Refreshing dirty soda with diet coke, coconut syrup, sweet cream, and lime. This Sonic copycat is guilt-free and incredibly satisfying!
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Course: Drinks
Cuisine: American
Keyword: Sonic Recipes
Prep Time: 10 minutes
Servings: 1
Calories: 37kcal

Ingredients

Sugar-Free Sweet Cream

  • 1 packet Splenda
  • 1/4 teaspoon vanilla extract
  • 1 cup half-and-half

Dirty Diet Coke

  • ice
  • 12 ounces Diet Coke
  • 2 teaspoons sugar-free coconut syrup
  • 2 teaspoons diet sweet cream recipe provided
  • 1 lime wedge

Instructions

  • To make the sugar-free sweet cream, combine the Splenda, vanilla extract, and half-and-half in a small bowl. Stir until the Splenda is completely dissolved. This makes enough sweet cream for approximately 24 servings.
  • To make the Dirty Diet Coke, fill a tall glass about 3/4 full with ice. Add the Diet Coke and coconut syrup and stir gently with a bar spoon to combine. Top with 2 teaspoons of sweet cream and garnish with a lime wedge. Serve immediately.

Nutrition

Calories: 37kcal | Carbohydrates: 8g | Protein: 1g | Fat: 1g | Saturated Fat: 1g | Polyunsaturated Fat: 0.1g | Monounsaturated Fat: 0.3g | Cholesterol: 4mg | Sodium: 21mg | Potassium: 105mg | Fiber: 2g | Sugar: 2g | Vitamin A: 69IU | Vitamin C: 20mg | Calcium: 43mg | Iron: 0.5mg

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Check out more of my easy drink recipes and the best copycat fast food recipes on CopyKat!

About Stephanie Manley

Stephanie Manley is the creator of CopyKat.com. She has been recreating copycat recipes since 1995. Learn more about Stephanie Manley.

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