In this exclusive clip from Discovery Channel’s brand new season of Man, Woman, Wild, survivalist Ruth England gets the bitter taste, also known as tannins, out of the acorns to make them edible.

Ruth has a heap of acorns, but knowing how bitter they can be, she crushes them up with a rock the way local natives traditionally did. She sticks the crushed acorns in her sock and puts the sock in a nearby stream overnight to reduce the tart tannins.

In the fifth episode that airs this Friday at 9 p.m. on Discovery, Mykel and Ruth are stuck in the mountainous desert of California after their donkey runs off. With nothing but a canteen of whiskey, the pair is forced to survive the harsh environment.

Each Thursday during this season of Man, Woman, Wild, is running exclusive survival tips. Make sure to jot down your thoughts in the comments section. In a few weeks they’ll answer reader questions.