recipe i got off the net:

Items needed:

1 gram or half gram of high quality herb
Two crackers
Peanut Butter
Foil
Oven

Preheat oven to 320 F

Obtain Crackers and spread on a glorious amount of peanut butter ( I like the crunchy stuff, mmmm )

Place weed nugget or piece of hash onto the center of the peanutty goodness, and sandwich the two to form a FireCracker.

The oven should be ready now, wrap the Firecracker in the Foil (completely) shiny side out. Put the Firecracker(s) on a baking sheet in the center of your oven, or whoevers dude lol.

Bake for 20-30 minutes

Check by unwrapping every 10 minutes after the first 15 minutes. If it starts to burn, turn down heat 50 degrees.
Firecrackers are very nasty if they burn, but when you get them right they are oh so delicious!