Combine glue, water, a few drops of brown paint, and a few drops gingerbread fragrance oil. I suggest starting with 1 drop of the fragrance oil, stirring, and seeing if that gives you enough scent -- if not add additional oil 1 drop at a time.
Add brown and gold glitter to the glue mixture. Stir.
Add baking soda and stir well to combine.
Add 1 tbsp contact solution and stir to combine. The slime will instantly begin to form when it is introduced and it will be very sticky. Use your hands to knead the slime until it is less sticky.
Notes
Store slime in an airtight container to prevent drying.