Place the chopped watermelon and lemon zest into the blender jar, ensuring the watermelon is evenly distributed around the zested lemons.
4 cups watermelon, roughly chopped
Add the sugar or honey to the blender, then pour in 2 cups of cold water to facilitate blending.
4 cups watermelon, roughly chopped
Secure the lid on the blender and blend on high speed until the mixture is smooth and slightly frothy, about 30 seconds. Look for a uniform, vibrant pink-green liquid without large chunks.
Set a fine mesh strainer over a large pitcher and pour the blended mixture through it, pressing gently with a spatula to extract as much liquid as possible, resulting in a fragrant, slightly cloudy drink.
Chill the strained watermelon lemonade in the refrigerator for at least 30 minutes until cold. Serve over ice, garnished with additional lemon zest or watermelon slices if desired.
