Full disclosure - the following is a silly question.
The Grease spell states:
Slick grease covers the ground in a 10-foot square centered on a point within range and turns it into difficult terrain for the duration. When the grease appears, each creature standing in its area must succeed on a Dexterity saving throw or fall prone. A creature that enters the area or ends its turn there must also succeed on a Dexterity saving throw or fall prone.
There is already a precedent to making an item replicate the Grease spell, namely the Oil of Slipperiness:
Alternatively, the oil can be poured on the ground as an action, where it covers a 10-foot square, duplicating the effect of the grease spell in that area for 8 hours.
An Alchemy Jug is capable of producing up to 2 gallons of mayonnaise per day. I'm wondering how many gallons of mayonnaise (and thus how many Alchemy Jugs) would be required in order to replicate the effect of the Grease spell, if it can be done at all.