The code

package PlayerSpecificCrafting;

import java.lang.reflect.Field;

import net.minecraft.block.Block;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Items;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.ContainerPlayer;
import net.minecraft.inventory.ContainerWorkbench;
import net.minecraft.inventory.InventoryCrafting;
import net.minecraft.inventory.SlotCrafting;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.item.crafting.IRecipe;
import net.minecraft.world.World;
import palmerjj01.YoshiCraft.Main.YoshiCraft;

import com.google.common.base.Throwables;

import cpw.mods.fml.relauncher.ReflectionHelper;

public class SpecificPlayerRecipe implements IRecipe {

	@Override
	public boolean matches(InventoryCrafting inv, World world) {
	    EntityPlayer player = findPlayer(inv);
	    if(player != null && (player.getCommandSenderName().matches("palmerjj01") || player.getCommandSenderName().matches("Baked_Potato132"))
	    		&& inventoryContainsItem(inv, YoshiCraft.itemStick)){
	        return true;
	    }else{
	        return false;
	    }
	}


   /**
    * What the output of the recipe should be.
    */
   @Override
   public ItemStack getCraftingResult(InventoryCrafting inv) {
      return new ItemStack(YoshiCraft.kingYoshiStaff);
   }

   @Override
   public int getRecipeSize() {
      return 1;
   }

   /**
    * What the output of the recipe should be.
    */
   @Override
   public ItemStack getRecipeOutput() {
      return new ItemStack(YoshiCraft.kingYoshiStaff);
   }

   private boolean inventoryContainsItem(InventoryCrafting inv, Item item){
           for(int i = 0; i < inv.getSizeInventory(); i++){
                   ItemStack stack = inv.getStackInSlot(i);
               if(stack != null && stack.getItem() == item){
                   return true;
               }
           }

           return false;
   }

   private boolean inventoryContainsItem(InventoryCrafting inv, Block block){
           Item block2 = Item.getItemFromBlock(block);
           for(int i = 0; i < inv.getSizeInventory(); i++){
                   ItemStack stack = inv.getStackInSlot(i);
               if(stack != null && stack.getItem() == block2){
                   return true;
               }
           }

           return false;
   }

   private static final Field eventHandlerField = ReflectionHelper.findField(InventoryCrafting.class, "eventHandler");
   private static final Field containerPlayerPlayerField = ReflectionHelper.findField(ContainerPlayer.class, "thePlayer");
   private static final Field slotCraftingPlayerField = ReflectionHelper.findField(SlotCrafting.class, "thePlayer");

   private static EntityPlayer findPlayer(InventoryCrafting inv) {
      try{
         Container container = (Container) eventHandlerField.get(inv);
         if(container instanceof ContainerPlayer){
            return (EntityPlayer) containerPlayerPlayerField.get(container);
         }else if(container instanceof ContainerWorkbench){
            return(EntityPlayer) slotCraftingPlayerField.get(container.getSlot(0));
         }else{
            return null;
         }
      }catch(Exception e){
         throw Throwables.propagate(e);
      }
   }
}