Wash and break up cauliflower into bite-size florets.
Steam cauliflower until tender. You may do this on the stovetop or microwave steam for approximately 5 minutes.
Melt butter in a medium sauce pan over medium heat.
Whisk flour into the butter, and continue cooking for 2 minutes while stirring constantly.
Add milk slowly to the mixture, and continue stirring constantly until the sauce is smooth and thickened.
Add seasonings to taste, then mixture with drained cauliflower. Serve warm.