Clean the Lemons: Sprinkle a small pinch of salt (about 2g) over the 2-3 lemons and rub them gently for 30 seconds under running water to remove any wax or dirt. Pat them dry.

Zest and Juice: Use a zester or fine grater to remove the green zest from the lemons, being careful to avoid the bitter white pith. Cut the zested lemons in half and juice them, straining out any seeds.

Blend the Base: Place the lemon zest, lemon juice, and 850ml of cold purified water into a blender. Blend on high speed for 30 seconds.

Add Sweetness: Add the 50g of sugar and 60g of condensed milk to the blender. Blend again for another 10 seconds until everything is completely smooth and combined.

Strain and Serve: Place a fine-mesh strainer over a pitcher or large measuring cup. Pour the blended mixture through the strainer to remove the pulp and any small bits of zest. Fill glasses with ice and pour the strained lemonade over the top. Serve immediately.