Keto Royal Fizz

The Keto Royal Fizz: A Refreshing, Low-Carb Drink

Keto Royal Fizz

Everyone enjoys a delicious and refreshing cocktail from time to time, keto dieters included! While many low-carb cocktail options contain straight alcohol, sometimes, people on a keto diet want a little variation and refreshment added to their glasses.

Enter the Keto Royal Fizz! The Royal Fizz or Royal Gin Fizz is a gin-based cocktail that typically requires simple syrup. In case you didn’t know, simple syrup is high in sugar and a major no-no for keto diets. However, we’ve discovered an easy way to make a low-carb version. Let’s dive in!


Why Isn’t a Royal Fizz Keto?

A standard Royal Fizz contains simple syrup, which is a mixture of table sugar and water. Consuming sugar is one of the fastest ways to pull your body out of ketosis, so simple syrup generally isn’t permitted on a keto diet.

Most people on a low-carb diet stay under 20-50g of net carbs a day while maintaining ketosis, so you might be able to have some simple syrup without doing too much damage. 

However, most people on a keto diet are health conscious and will try to avoid simple sugars as much as possible.

How to Make Keto-Friendly Simple Syrup

Thankfully, you can make a low-carb version of the delicious Royal Fizz cocktail by using your keto-friendly simple syrup!

To make a low-carb simple syrup, just mix one part water with one part keto-friendly sweetener. We use powdered allulose because it blends well, but you can use Stevia, powdered monk fruit, sucralose, or erythritol. 

Any sweetener with zero net carbs is perfectly acceptable!

How to Make Keto Royal Fizz


There are just a few simple ingredients you’ll need to start this low-carb mixology project.


  • 3 oz Gin
  • 2 oz Fresh lemon juice
  • 1 oz Low carb simple syrup
  • 5 oz Unflavored club soda
  • 1 Egg


  1. Fill a metal cocktail shaker with ice.
  2. Add gin, low-carb simple syrup, lemon juice, and egg.
  3. Shake vigorously for 30-45 seconds.
  4. Strain into serving glass
  5. Slowly add club soda. Enjoy!

Is Alcohol OK on Keto?

Distilled alcohols — including vodka, gin, bourbon, whiskey, and tequila, among others — are naturally low carb, and most contain no net carbs at all. Drinking alcohol like this will not pull you out of ketosis.

Wine on keto is also a favorite option of many long-time low carbers. 

However, alcohol does contain calories and will be processed by your body. The ethanol in these beverages is processed by your liver, which breaks it down into acetates. 

Your body will naturally use these acetates for energy, meaning fat is no longer the primary fuel source.

Unlike when you consume starches or sugars, your body will quickly use up the acetates and then continue using fat as its source of energy. 

Ketosis will be slowed a bit when you consume a low carb keto cocktail, but you’ll quickly return to a state of ketosis after the alcohol is broken down and used.

Low Carb Royal Fizz Variations

There are a few low-carb variants you can try when it comes to making your Keto Royal Fizz.

Strawberry Keto Royal Fizz

Strawberry Keto Royal Fizz

Strawberries do have sugar, so make sure to factor in any additional carbohydrates you consume when you drink keto cocktails made with this variant.

  1. Add fresh strawberries to your simple syrup. 
  2. Combine about a pound of chopped, fresh strawberries with a cup and a half of water. 
  3. Bring to a boil and leave for 15 minutes, uncovered. 
  4. Remove the pot from heat, strain, and mix in a cup of keto sweetener.

Blueberry Keto Royal Fizz

For a hint of blueberry in your keto cocktail, follow the same instructions as the strawberry variant, but use a pound of blueberries instead.

Blueberries are lower in sugar than strawberries, but they do have some, so you should still monitor consumption.

Jalapeno Keto Royal Fizz

If you fancy a little heat in your glass but still want to keep your drink low carb, you can make a jalapeno simple syrup. 

  1. Boil a cup of water, a cup of the keto sweetener of your choice, and ⅓ cup of sliced jalapenos for 10 minutes. 
  2. Strain any peppers out.
  3. Use the syrup to make your Keto Royal Fizz.

“Gold” Keto Royal Fizz

A standard Royal Fizz contains a whipped egg to add frothiness and fizz, but you can change up the recipe a bit by excluding the egg white and only adding in the yolk. 

The result is a bit of a creamier texture. You can even add a second yolk if you want to amp up the mouthfeel.

“Silver” Keto Royal Fizz

As you might guess, a Silver Keto Royal Fizz is made with just the egg white rather than the whole egg. When you exclude the yolk, you get a fizzier and lighter mouthfeel. 

This is a good option for low-carb dieters who might have reached their fat intake goals for the day and want to stick to protein in their cocktails.

Matt Gaedke is the founder of Connect with him to learn more about the keto diet and to get recipe inspiration on Instagram.



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