Coconut oil is very good if you are looking to make something you can use in various foods. Basically throw a few tablespoons in a pan and heat it up slowly. Once it's hot, throw your flower in and stir a lot for 5-10 mins, then pour it into a clean jar and let it cool. It should go hard again. Then if you make anything, like brownies, flapjack, etc, then throw a teaspoon or two in the mix. I find coconut oil to be much more stable than butter and less likely to go rancid, but if you are worried about butter or any oil going off, you could freeze it.
I prefer tablet over fudge. My recipe goes something like this.
Half a can of condensed milk
A small cup of sugar
A lump of butter (I tend to use about a quarter of block)
A teaspoon of coconut oil
A teaspoon of ginger
AVB or flower of whatever amount you want (I think 1-2g is more than enough)
Heat the butter, coconut oil/fat and ginger in a pan until hot. Then add the flower and/or
AVB and stir for 5-10 mins. Then add the condensed milk and sugar. Stir vigorously until the mixture has a dark brown colour and if you drop it on a spoon it turns hard and breaks easily. Pour and scrape out pan on to a tray covered in greaseproof paper and put somewhere to cool. one harder you can score it or just wait for it to fully cool and break it up into chunks.
I'd just say be careful with how much you use, especially if you prefer more energetic strains that are heavily
Sativa. The chances of a whitey increase quite steeply.
Indica strains are good and your inevitable outcome is sleep. But
Sativas can be the devil. A few years back i was gifted some Blueberry Haze and I proceeded to make some fudge with it and I used very little flower in it and the first piece I ate was somewhere on the border between sanity and insanity. Just one small piece. I literally saw walls bleed and faces morph out of them. It was super uncomfortable for maybe 5 hours. Of course me being a complete idiot did it again several times, but by the fifth week I could tolerate it a lot better and OEV's were less and not so demonic. My friend told me that stuff was some of the strongest he'd ever had. He is a pro in comparison to me, like Cheech Marin level and he said it put him on his ass. He couldn't believe I was doing edibles from it, well exact words were "you are a maniac".