Yes, millet flours can generally be mixed and stored together in an airtight container in a cool, dry place, provided they are all fresh and free from any signs of spoilage.
Mixing millet flours is a common practice, especially when you want to create a blend with a specific flavor profile or nutritional composition. Different millet varieties, such as pearl millet, foxtail millet, and finger millet, have slightly different tastes and textures. Combining them can result in a more balanced and interesting flour blend.
When storing mixed millet flours, the key is to prevent moisture and pests from getting in. Moisture can lead to mold growth and spoilage, while pests can contaminate the flour. Therefore, use an airtight container, such as a glass jar or a plastic container with a tight-fitting lid. Store the container in a cool, dry place, away from direct sunlight and heat. A pantry or cupboard is usually a good option.
Before mixing the flours, ensure that each type of millet flour is fresh and free from any signs of spoilage, such as a musty odor or visible mold. If any of the flours show signs of spoilage, discard them to prevent contamination of the entire batch. Properly stored millet flour, whether mixed or unmixed, can typically last for several months. It's always a good idea to label the container with the date of mixing to keep track of its freshness.
To extend the shelf life of your millet flour mix, consider storing it in the refrigerator or freezer, especially in warmer climates. This will help to slow down the oxidation process and prevent the development of rancidity.