So to start you need the basic recipe that you can get here. Make sure you have made it at least one time before trying to add anything to it so you know what to do and what to look for when you are making soap.
Ingredients
2 tablespoons grated orange peel (I used clementines).
1/4 cup ground oats. Grind them in the blender. I ground mine into a fairly fine powder.
2 teaspoons sweet orange essential oil.
Extra whole oats and grated orange peel to press into the top for aesthetics.
Follow the entire basic recipe that I linked to above and when you get to the end of your cooking time (50 minutes) stir the grated orange and ground oats into the soap mixture. I like to wait for it to cool a little bit before adding the orange essential oil.
After it has cooled for a little bit I add my oil and stir it all up. You can add up to 1/4 cup water if it is hard to stir.
Then I plop it all down into my prepared mold. You can use almost anything that is not metal as a soap mold. Press the extra orange peel and whole oats into the top to make it look fancy.
I normally set it outside to cool. Sometimes I cover it to try to keep the essential oils from evaporating out. After about 12 hours you can take it out and cut it into bars. It is usable right away but it will be better if you let it cure for about 1 week.