This one uses handmade soap. It says dry so i would recomend a mostly olive bar.
Essence de Lavande Laundry Powder
All measures by weight (scale). 1 pound, very dry, grated cold process soap 8 oz. washing soda (not baking soda) 8 oz. borax lavender essential oil – 1/2 oz. (I prefer lavender, but you can also use eucalyptus, or a blend.)
Mix dry ingredients in large bowl with gloved hand. Add essential oil by sprinkling on top. Mix again and dispense into containers. Ball Jars work well if you are giving these as gifts. Tie off with raffia at lid and attach a handmade tag with these instructions:
For light loads, use 2 tablespoons; for sheets or heavy laundry, use 1/4 cup.