I tried putting this recipe in the config.yml:
g_vodka:
name: 'Rancid Vodka/&6Golden Vodka/&6Shimmering Golden Vodka'
ingredients:
- Potato/10
- Gold_Nugget/2
cookingtime: 18
distillruns: 3
age: 0
color: ORANGE
difficulty: 6
alcohol: 20
effects:
- WEAKNESS/28
- POISON/4
But that didn't work. Does anyone know what I am doing wrong?

Did you do /brew reload ?
Did it say anything as an error?

Did you do /brew reload ?
Did it say anything as an error?

I did reload and didn't receive any error

Try changing one of the default recipes first and see if that works. Then when you add the new recipe, make sure it is in exactly the right format as the others, with the same indents and spacings.