Step 1: Prepare the Blueberry Syrup

In a small saucepan over medium heat, combine your blueberries, water, and erythritol. Stir occasionally and let it simmer until the blueberries burst and the mixture thickens to a syrupy consistency—about 10 minutes should suffice.

Step 2: Strain the Syrup

Once your syrup is ready, strain it through a fine mesh sieve to remove the blueberry skins, pressing to extract all that lovely juice. Allow it to cool to room temperature. This will serve as your flavorful base.

Step 3: Assemble the Drink

In a glass filled with ice, pour about 2 tablespoons of your prepared blueberry syrup. Adjust this amount based on your preferred level of sweetness and blueberry flavor.

Step 4: Add Sparkling Water

Pour in a cup of sparkling water to create that refreshing fizz. Watch the bubbles react and give your drink a lively feel.

Step 5: Add the Half-and-Half

Finally, pour in the creamy half-and-half to give your drink a silky, smooth finish. Stir gently to combine all the ingredients, and enjoy your refreshing Italian cream soda!