Did you know that...

Lemons produce electricity. Their citric acid is an electrolyte that allows electricity to flow between electrodes made from dissimilar metals. Several wired lemons in a series will illuminate one LED bulb. You can try this experiment at home but wash and eat all your lemons afterwards. Save your lemons by learning tips to buy, store and cook.


  • Lemons with a deep yellow colour will be riper and sweeter than greenish fruit.
  • Meyer lemons are sweeter than thin-skinned lemons.
  • Lemons that are not very juicy still be used. Check out the recipe below. 


  • Keep lemons in the fridge.
  • If you have excessive amounts, make lemon juice and keep it in ice trays in the freezer, ready for summer.


Waste hack bitters

Makes up to 250ml or 1 jar

Lemon-lime and bitters aren’t just for nights out. Make your own at home! Keep all your spent lemons for this clever Cornersmith tonic. Already juiced lemons go further simmered with whole spices, lemongrass, sugar and water to create a sweet, bitter and refreshing cordial. If you don’t have enough lemon husks, you can make a smaller batch or freeze them till you have a larger quantity.


Waste hack bitters step 1

Step 1: Place the pith and skin of 4 lemons, 5 all spice berries or a cinnamon quill, 2 star anise, 1/2 teaspoon black peppercorns, 1 tablespoon of juniper berries or caraway seeds, 1 stalk lemongrass and 1/2 teaspoon salt into a pot. Cover with 2 cups of water.

Waste hack bitters step 2

Step 2: Over a medium heat bring to a boil and then turn the heat down and allow to gently simmer covered for 20 minutes.

Waste hack bitters step 3

Step 3: Turn off the heat and let the ingredients steep overnight.

Waste hack bitters step 4

Step 4: Strain the mixture into a clean and dry bottle or jar.

Waste hack bitters hero

Impress your guests by serving on ice with sparkling water and making some leftover cheesy shortbreads to nibble.



Store in the refrigerator for up to 2 weeks.

Zero waste tip

Serve on ice with water for a refreshing drink. Cornersmith suggests adding 2 tablespoons to 30ml of gin and top with sparkling water for a classic gin and tonic. Use it like a lemon syrup on desserts or cakes.


Recipe inspired by Cornersmith’s Waste Hack Bitters

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Page last updated: 11 Feb 2022