Acid
Air
Apple = Tool + Tree

Bat = Air + Vampire
Blood = Man + Weapon
Blood = Woman + Weapon
Box = Tools + Wood

Corpse = Man + Weapon
Corpse = Woman + Weapon

Dough = Flour + Water

Earth

Field = Earth + Tools
Fire
Flour = Stone + Wheat

Ghost = Acid + Woman
Ghost = Man + Weapon
Ghost = Woman + Weapon
Ghost Balloon = Air + Ghost

Jack-in-the-Box = Box + Joker
Joker = Man + Poison gas

Magic
Man
Metal = Fire + Stone

Poison = Acid + Air
Poison gas = Air + Poison

Scary Skull = Skull + Torch
Seeds = Apple + Earth
Skeleton = Acid + Woman
Skull = Skeleton + Tools
Spooky Cake = Dough + Fire
Spooky Staff = Skull + Stick
Stick = Tools + Tree
Stone

Tools = Woman + Metal
Torch = Fire + Stick
Tree

Vampire = Blood + Man
Vampire Fangs = Vampire + Tools

Water
Weapon = Man + Metal
Wheat = Field + Seed
Wings = Acid + Bat
Witch = Magic + Woman
Witch's Hat = Water + Witch
Woman
Wood = Tools + Tree

You start with Energy, Man, Woman x2, Beast, Werewolf, Darkness, Sin, Tools and Weapon. You end with Witch's Hat. There are lots of combos, here's the path to the correct solution.

Darkness + Beast = Demon
Demon + Energy = Magic
Magic + Woman = Witch
Sin + Weapon = Wrath
Man + Wrath = Warrior
Warrior + Werewolf = Wool
Wool + Tools = Fabric
Fabric + Woman = Clothing
Clothing + Witch = Witch's Hat

You start with Earth x2, Fire, Apple, Radiation and Tools. You end with Grass, Jack-o-Lantern, Mushroom and Wood. There are lots of combos, here's the short path to the correct solution.

Apple + Earth = Seeds
Earth + Seeds = Grass, Mushroom, Tree
Tools + Tree = Apple, Stick, Wood
Fire + Stick = Torch
Apple + Radiation = Pumpkin
Pumpkin + Torch = Jack-o-Lantern