Electric blankets are used to reduce the level of stress and anxiety that you may have. They are a comforting item and the use of the electric blanket in a dream is seen as a spiritual tool that provides comfort and relief.
Using an electric blanket in your dream can indicate what is going on with your personal relationships. This can be seen when you use an electric blanket to cover someone else up as this could mean you need to protect them from something bad happening; or when you cover yourself up with an electric blanket while they are saying hurtful things to you.