For this technique, you'll need only one tool, but you will likely need some practice to perfect it.
The tool is your large chef's knife. Ironically, you won't be using the cutting edge of the blade.
- Carefully pierce the softest eye of the coconut and drain its fluid.
- Holding the coconut in one hand (your non dominant, ideally), crack the blunt backside of the knife against the "equator" of the coconut repeatedly, rotating it slightly after each whack.
With a few solid hits, a crack will form, and soon the whole husk will split.
Buy the J.A. Henckels 8-inch Chef's Knife on Amazon for $53.29