Tempting Witch
Creature — Human Warlock
When this creature enters, create a Food token. (It's an artifact with ", 
, Sacrifice this token: You gain 3 life.")
, , Sacrifice a Food: Target player loses 3 life.
"Murder clad in crimson beauty, An end to life and love and duty." —Barrow witch incantation
Illustrated by
Throne of Eldraine#108CommonEnglishLegality
Rulings
Whatever you do, don't eat the delicious cards.
You can't sacrifice a Food to pay multiple costs. For example, you can't sacrifice a Food token to activate its own ability and also to activate Maraleaf Rider's ability.
If an effect refers to a Food, it means any Food artifact, not just a Food artifact token. For example, you can sacrifice Tough Cookie (an Artifact Creature — Food Golem) to activate Maraleaf Rider's ability (an ability with "Sacrifice a Food" in its cost).
Food is an artifact type. Even though it appears on some creatures, it's never a creature type.