Yes, making vanilla brioche ahead of time is not only possible but highly convenient! You can prepare the dough up to the first rise and then refrigerate it for up to 24 hours, allowing for slow fermentation, which can enhance the flavor. Once you divide and shape the dough, instead of allowing it to rise at room temperature, you can cover it and place it in the fridge for a second rise. When you’re ready to bake, simply remove it from the refrigerator and let it rest at room temperature while your oven preheats. To store baked vanilla brioche, keep it in an airtight container at room temperature for up to two days. For longer storage, you can freeze it, and when ready to enjoy, simply let it thaw and warm it up slightly in the oven for that fresh-baked feel.