Set the oven temperature to 245ºF, with the oven rack in the middle position. Ovens are hotter at the top and cooler at the bottom, so heating in the middle will ensure an ideal decarboxylation temperature.
Line the baking sheet with parchment paper or aluminum foil (shiny side facing the herb), and lightly break up the cannabis onto it. Shoot for even distribution and sized flower- coarsely ground is best.
Heat for 30-40 minutes, stirring/agitating the tray twice.
Let cool for 30 minutes at room temperature.
When cool enough to handle, add the decarboxylated cannabis to butter, oil, or another base for an infusion.