Step 1
Close the toaster oven door and unplug the cord from the outlet, if you can do so safely.
Step 2
Pull the pin on the fire extinguisher, if necessary. Aim the extinguisher at the base of the flames, and spray with a sweeping, side-to-side motion.
Step 3
Toss handfuls of baking soda at the base of the flames if you do not have a fire extinguisher. When heated, baking soda releases carbon dioxide, which will help smother the fire.