Conjure Treat

You conjure a small fresh pastry that smells and looks perfectly appetizing to any creature that can see and smell it. As an action a creature can eat it. If a creature does so it must make a Constitution saving throw against your spell save DC or take 1d10 poison damage and fall unconscious for 1 minute. A creature who succeeds the saving throw has no idea of the nature of the treat. If you cast this spell while a treat created by the spell already exists, the oldest one disappears. 

This spell's damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).