Preheat oven to 350 F. Put a medium sized saucepan on medium-low heat.
Add butter and allow it to melt.
Add salt and stir to dissolve salt in melted butter.
Remove from heat.
Pour peanuts into a mixing bowl and drizzle the salt and butter mixture over the top.
Mix thoroughly, using your hands.
Place baking paper on a cookie sheet and spread peanuts over it.
Bake for 10 minutes.
By then they should be beautifully brown and crispy.
Be careful to not burn them.
Enjoy!
Note: If you cant find un-shelled peanuts or if you are facing difficulty removing the shells from shell-on peanuts, place them in the fridge overnight.