Pour the bija seeds into a small saucepan. Add garlic, oregano, and thyme.Pour in the oil.
2. Cook in oil
Heat on the stove at very low heat for one hour.Once the hour has passed, remove from the heat, and set aside to cool to room temperature. Sieve with a fine sieve to discard the solids.
3. Storing achiote oil
Pour into a clean bottle with a tight fitting lid, and store at room temperature. This has a long shelf life, but it's best used within the month.
Video
Notes
You can add or omit other flavoring ingredients of your choice, though this may affect its shelf life.