This homemade sweet and spicy watermelon soda is the perfect fizzy drink to quench your thirst on a hot day.
In a small saucepan over medium heat, add sugar and water. Let cook until sugar has dissolved and then remove from heat.
Add in jalapeño and let steep for at least 1 hour.
Strain out jalapeño and transfer syrup to a sealable jar. Stick in fridge until ready to use.
Working in batches, puree the watermelon in a blender and then strain through a fine mesh strainer.
Stir in lime juice. Transfer to a pitcher and add soda water and ice.
Add in 1/4 cup jalapeño simple syrup and taste. Add more simple syrup if desired.