Open the crafting table
Place 8 cobblestone blocks in every slot except the center
Leave the center slot empty
Take the furnace from the result box
Move the furnace into your inventory
Place the furnace wherever you want to use it
Open the crafting table
Place 8 cobblestone blocks in every slot except the center
Leave the center slot empty
Take the furnace from the result box
Move the furnace into your inventory
Place the furnace wherever you want to use it