Bring honey to a boil in an medium non-stick saucepan. On high heat let the honey boil until it reaches 120℃ (248℉) on a candy thermometer
Remove the pot from the heat and add the peanut butter and vanilla extract (optional). Use a silicon rubber spatula and mix until well combined. If you want to add some extra nuts you can do so now.
Pour the mixture into a small plastic food container, sprinkle some crystal salt flakes over the mixture (optional) and cover with a lid. Allow it to cool before placing it in the refrigerator.
Refrigerate for at least 2-3 hours. Remove the peanut butter and honey candy from the food container and cut it into pieces.
If you want to make the candy thinner, you can spread the mixture on parchment paper and then cool it. Then store it in an air-tight container.
Notes
The ratio is simple: 1 part honey to 1 part peanut butter
You can use any nut butter of your choice and even Tahini (sesame paste).
You can even add some extra nuts in the mixture or top it with some chocolate.