For the best texture, avoid boiling the cauliflower directly in water, as it can become waterlogged and lead to a thin mash. Steaming keeps the florets tender but not soggy and helps them absorb the buttery, cheesy flavors more effectively. If you do not have a food processor, a potato masher or immersion blender works well, but take care not to overblend with an immersion blender to prevent a gluey texture. The mash can be made up to 3 days in advance and reheated gently on the stovetop or in the microwave, with a splash of cream or a small pat of butter stirred in to restore creaminess. For freezer meal prep, portion the cooled mash into airtight containers and freeze for up to 3 months, then thaw overnight in the refrigerator before reheating. Customize the flavor by adding a pinch of smoked paprika, extra garlic powder, or a bit of jalapeño for heat while still keeping the macros keto friendly.