Equipped creature gets +2/+1.
Whenever equipped creature deals combat damage to a creature, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this artifact: You gain 3 life.")
Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)
Food is an artifact type. Even though it appears on some creatures (such as Gingerbrute), it's never a creature type.
The triggered ability of Giant's Skewer triggers even if the equipped creature died, and even if the creature that was dealt damage didn't die.
Whatever you do, don't eat the delicious cards.
You can't sacrifice a Food token to pay multiple costs. For example, you can't sacrifice a Food token to activate its own ability and also to activate the ability of Tempting Witch.