Paper plugin to add a gunpowder recipe to the furnace, which blows you up if you try to smelt gunpowder in a furnace.
Based off of this.
Download plugin jar from the releases page and install it in /plugins
You can change the power and if the explosion will set fire to surroundings in the config.yml file.
explosion:
power: 10 # The power of the explosion. Regular TNT is 4
fire: false # Whether fire should be generated with the explosion.Soon™