If you enjoy making your own blends for the bath, I suggest taking a look at Natural Beauty at Home or Natural Beauty from the Garden by Janice Cox.
I think this recipe may have originated in Janice's book: Natural Beauty for All Seasons: 250 Simple Recipes And Gift-Giving Ideas For Year-Round Beauty published in 1996. I had a copy of the book back when I first started working with herbs in the 90s. It was left out in the garden and rained on in a monsoon, so all I have left are a few pages I tore out of the book before I disposed of the moldy carcass.
This recipe created molded tablets you can dissolve in the bath. The honey in the recipe will bring moisture back to your skin. These tablets must be molded while warm, so unless you have help to get them molded quickly, I suggest making them one batch at a time. This is a great gift idea as you can mold the salts into any shape and can make them holiday specific if you want. There are many variations you can create with the recipe, just use about 1/2 Tablespoon of herbs in the recipe. I chose a combination of lemon herbs and scents, but you can use calming herbs like lavender, or skin soothing like rose, or even marjoram for relaxation.