This is a nice, neutral blessing that I put into my food and baked goods while I’m cooking them up. No extra seasoning or special substances are required, though it can be used in conjunction with other food magics.
While mixing ingredients together or stirring the pot, take a few deep breaths, focus on the food, and say or clearly think the following:
Whosoever eats of this [food],
may prosperity find them,
may good health be with them,
may happiness shine on them,
and no harm befall them.
Finish the food as you normally would, and serve it to whoever you wish.
And yes, that includes yourself. It‘s not required that you do this solely for the benefit of others. You’re allowed to do magic to give yourself a blessing too!
Need a specific blessing? Make up one of your own, and put that into the food as needed.
(Keep in mind that some people do not want unasked-for blessings, no matter how neutral or pleasant they may be. If you are serving the food to someone that you know is not comfortable with such things, either ask beforehand if they mind you blessing the meal or bless portions as you serve them so that theirs can be omitted if they prefer.)