Cooked quinoa releases liquid during freezing because the water molecules within the quinoa expand as they freeze, disrupting the cell structure and causing water to be expelled upon thawing. This results in a change in texture and the release of free water.
When quinoa is cooked, it absorbs water. This water is held within the cellular structure of the quinoa grains. When you freeze cooked quinoa, the water inside the cells turns to ice. Water expands when it freezes. This expansion causes the cell walls to rupture and break down. When the quinoa thaws, the damaged cells are no longer able to hold the water as effectively. This leads to the release of the water that was previously bound within the cells, resulting in a watery or mushy texture. The amount of liquid released depends on factors such as the initial moisture content of the quinoa, the rate of freezing, and the thawing method. Slower freezing tends to create larger ice crystals, causing more damage to the cell structure.
To minimize liquid release, spread the cooked quinoa in a thin layer on a baking sheet before freezing. This allows for faster freezing and smaller ice crystal formation, which reduces cell damage. Once frozen, transfer the quinoa to an airtight container or freezer bag.