Hi Leah
I have a choc mint soap recipe for you. Its in grams though, so you might have to convert to pounds and ounces. Total batch weight is 3.125kg
olive oil 1000gm
coconut oil 500gm
soy bean oil 375gm
palm oil 250gm
cocoa butter 250gm
lye 326gm
water 750gm
peppermint fragrance oil 90gm
cocoa powder 60gm
* reserve 2 tablespoons of oil to mix with cocoa powder. When oils and lye have reached 100F, combine and bring to light trace. Add your pepper-mint fragrance, working quickly. Take out 1 and a half cups of the soap and mix the cocoa powder into this. The main part of the batch can be left white or coloured a light green. This makes a nice contrast to the chocolate swirl. This can now be poured into your mould. ( I use a large divider mould). Then drizzle the chocolate coloured part over the top in a criss cross motion. Take a small spatula (or chopstick works well), and swirl circles into the soap. Dont over mix or it will all be one colour. Leave in the mould for at least 48 hours before you touch it.
Good luck and hope you enjoy it!