How do you say the Bar b q sauce is very hot?

Casual:

* "This BBQ sauce is fire!"

* "Whoa, this sauce is really spicy!"

* "This BBQ sauce packs a punch!"

* "This is hot stuff!"

* "This BBQ sauce is burning my mouth!"

More descriptive:

* "The BBQ sauce has a serious kick."

* "This sauce is intensely spicy."

* "The heat in this BBQ sauce is unbelievable."

* "The BBQ sauce has a fiery flavor."

Formal:

* "This BBQ sauce is highly spiced."

* "The BBQ sauce has a strong chili pepper flavor."

You can also add details to your description:

* "The BBQ sauce is very hot, with a smoky, chili pepper flavor."

* "It's a sweet and smoky sauce with a serious kick of heat."

Remember to choose the best phrase based on your context and audience.