To make homemade body powder you need: Baking Soda and Cornstarch or Arrowroot Powder. I'm using cornstarch this time.
Add in equal parts Baking Soda and Cornstarch. For this I used 1/4 cup Baking Soda.
Add in 1/4 cup of Cornstarch or Arrowroot Powder. Both are starches and will help to absorb and control moisture.
Mix it all up!
Now, use your freshly minted Body Powder. Apply a liberal amount to any area that you want to keep dry and you're good to go!
See this homemade Body Powder recipe and others like it at thehomemadeexperiment.com