Tap some gold luster dust into the well of a food-dedicated paint palette.
Use a plastic transfer pipette to transfer a few drops of alcohol to the well with the dust. Stir it around with a food grade paintbrush to make the gold suspension. You may need to add more luster dust or more alcohol depending on the consistency of the suspension.
Paint the Oreos:
Dip the paintbrush into the liquid gold and then quickly brush across the top surface of the Oreo cookie, making sure to also paint the sides of the top wafer.
Repeat with the remaining Oreos. As you use the suspension, you will need to remake more in the same well. The alcohol evaporates quickly, so if you don't use it right away, you will need to add another drop or two to get the suspension back to the original consistency.
Once the first side of the cookies has dried, flip them over and repeat the process on the second side.
As on optional step, sprinkle the cookies with gold edible glitter for extra sparkle.
Store the cookies in an airtight container at room temperature for up to several weeks.