My source is organic which is always nice and 'tingles' in soap just like peppermint. For all those who wanted the recipe here you go...
Wild Mint Tingle Soap
1 lb melt and pour goat milk base
15 ml Mentha Arvensis essential oil
1/2 c. ground oatmeal
Melt the soap base. Cool until thickening but still pourable. Add the essential oil and ground oatmeal. Stir well and cover until hardened. Cut into 4-6 bars of soap. Wrap each well and store in a cool dark place just as you would essential oils. Use within 6 months --essential oils evaporate quickly so make only as much as you will use. You can try adding the eo's to a Tablespoon of orris root powder and it will hold the scent longer.
Warning: This really DOES tingle sensitive parts. It won't burn the skin in this dilution. But it does leave a cooling tingle that lasts for 20 min to an hour.