Not for eating, just for the bath. Though, you can make it for the kitchen if you just replace the Epsom salt for Kosher salt and use mint leaves and food grade lavender. I grow my own lavender so I just use that.
Lavender Mint Bath Salts
3 cups pf Epsom salts
2 drops of mint essential oil
1/2 of lavender
Mix all together and pour into jars. You can pretty up the jars with labels. I used labels from The Graphics Fairy. If you don't already know about the Graphics Fairy then, boy are you in for a treat. She has taken many images that are not copyrighted and placed them on her blog for you to download for free. You can manipulate the images and size them to whatever your needs are.