A simple tip on how to keep guacamole from turning brown – and it’s not lemon juice. It’s water! That’s right. Topping off guacamole with water keeps air from being able to penetrate the guacamole, which keeps it from browning.

By using this simple technique, you can keep guacamole from browning for up to three days.

  1. To store guacamole, place it in an airtight glass storage container with a lid. A bowl with tightly sealed plastic wrap may also work.
  2. Use a spoon to flatten the surface of the guacamole and remove any air bubbles.
  3. Add about a ½ inch of filtered water to the top of the guacamole. Make sure the water covers the whole surface of the guacamole.
  4. Put the lid or covering on the container and store the guacamole in the fridge for up to three days.
  5. When you're ready to enjoy your guacamole, gently pour out the water and stir before serving.

*content sourced directly from AllRecipes