Gather 4 blocks of Iron
Craft the Iron into 4 Iron Blocks
Get 1 Carved Pumpkin or 1 Jack o’Lantern
Place the 4 Iron Blocks in a T shape on the ground
Put 1 Iron Block as the base
Place 3 Iron Blocks across the top of the base
Put the Carved Pumpkin or Jack o’Lantern on top of the center block
The Iron Golem will spawn automatically
For a Snow Golem, place 2 Snow Blocks vertically
Put a Carved Pumpkin on top of the Snow Blocks