You can get this achievement with either Aya, Rucha, or Dominica, (although you can only use this process with Aya or Dominica) simply get either of their cooking IC to level 6.
This is easiest to do once you reach Port Zala on disc 2.
Buy fresh milk from Faina and make Oradian Butter until you reach Level 3. (2 Fresh Milk = 1 Oradian Butter)
Now go back to Faina and buy Wood Syrup and Honey and make Royal Jelly until you reach Level 6. (2 Honey + 2 Wood Syrup = Royal Jelly)
Note: Dominica starts at IC Level 3 so you don't have to do the first part if you are using her. You can also sell all the Royal Jelly for a decent profit.