Put the summary of the bug you're having here 

What I expected to happen was...: Place 5 iron ingots, 1 furnace, 3 smooth stone in crafting table to craft a blast furnace. 

Describe what you thought should happen here

What actually happened was...: placed the items for the blast furnace recipe in the crafting table and no item was crafted, nothing happened.
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...