This is a rogue subclass about sauce. Specifically, hot sauce. Not much more to say.

Brewer's Supplies

At 3rd Level when you choose this subclass, you gain proficiency with Brewer's Supplies, but only when making hot sauce.

Spicy

At 3rd Level, when you choose this subclass, you can coat your weapon or weapons with hot sauce you made with your Brewer's Supplies. When you do this, your Sneak Attack deals an extra 1d6 fire damage, and your regular attacks deal an extra 1d4 fire damage.

At 9th Level, the damage increases to 1d8 on a Sneak Attack and 1d6 on a regular. At 15th Level, the damage increases to 1d10 on a Sneak Attack  and 1d8 on a regular.

Sauce Infused

At 9th Level, you gain resistance to fire damage and immunity to fire damage caused by your sauce. Additionally, you gain the ability to create a magical set of Brewer's Supplies by snapping your fingers and concentrating for 10 minutes. You can do this once per day. When you make a new set of Brewer's Supplies, the other set/sets you made all disappear.

Improved Hot Sauce

At 13th Level, your sauce can now cause healing as well as damage. When a creature allied with you eats your sauce, it now heals them 2d6 HP. At 18th Level, this increases to 4d6.

One With the Sauce

At 17th Level, you are so tied to the sauce that you can become it for a short period of time. Once per long rest, you can become a puddle of hot sauce for one minute, gaining the ability to go through up to 1-inch-wide and -tall cracks without squeezing. You also gain advantage on Stealth checks during this period of time. At 20th Level, you can do this twice per long rest. Your speed remains the same except that you cannot fly or swim.