Mix the water and granulated sugar in a medium-sized saucepan over medium-low heat. Stir until the sugar dissolves completely. This is your syrup base, the sweet backbone of your blue dog soda recipe.

Add the lemon and lime juice to the syrup base. Stir in the natural blueberry flavor. Here’s where the magic starts—add 1-2 drops of blue food coloring until you achieve that perfect, vibrant blue hue that makes blue dog soda truly iconic.

Remove the saucepan from the heat and let your blue concoction cool to room temperature. Then, strain the mixture using a fine mesh strainer to ensure a smooth syrup. Pour it into a pitcher and chill in the refrigerator until it’s cold.

When you’re ready to serve, fill each glass halfway with carbonated water. Slowly pour the chilled blue syrup into the glass, stirring gently to combine. Watch as the soda transforms into a bubbly, mesmerizing blue delight.

Add ice cubes if desired, garnish with a slice of lemon or lime, and serve your blue dog soda with a smile. Cheers to a homemade soda that’s as fun to make as it is to drink!