Quick Answer
Acorns can be used in homemade energy bars, but they require proper processing to remove tannins and make them palatable. The acorns must be leached to remove excess tannins, then dried and ground into a flour. This flour can be used in place of or in addition to other nut flours in energy bar recipes.
Preparing Acorns for Use in Energy Bars
Preparing acorns for use in energy bars involves several steps: harvesting, cleaning, leaching, and drying. Harvest acorns in the fall when they are mature and have fallen from the tree. Collect only acorns that are free from mold and insects. Rinse the acorns with water to remove any dirt or debris.
Leaching Acorns to Remove Tannins
To leach acorns, soak them in cold water for 24-48 hours, changing the water every 12 hours. This process can be repeated multiple times until the water runs clear. Leaching removes excess tannins, making the acorns safe to eat and reducing bitterness. For every 1 cup of acorns, use 4 cups of water for the soaking process.
Grinding and Using Acorn Flour in Energy Bars
After leaching, dry the acorns in a low-temperature oven (150°F - 200°F) for 1-2 hours, or until completely dry. Grind the dried acorns into a flour using a food processor or mortar and pestle. Use the acorn flour in place of or in addition to other nut flours in energy bar recipes. A general ratio is to use 25% acorn flour and 75% other nut flours. Store the acorn flour in an airtight container for up to 6 months.
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