Is Sonic Biscuit High in Histamine?

Sonic Biscuit

High histamine

This biscuit is high in histamine because of the buttermilk, with bleached flour adding to it.

Fast food is cooked in batches and held warm rather than made when you order it, so it is rarely as fresh as something cooked at home. That matters here because histamine builds up as protein foods sit, which means the same item can affect you differently depending on how long it waited.

Gluten Dairy

This is a baked biscuit of bleached wheat flour, palm oils, sugar, and buttermilk.

Buttermilk — cultured buttermilk is the high driver here, and it is what pushes the whole biscuit up.
Bleached enriched flour — the wheat flour sits at moderate, adding to the picture underneath the buttermilk.

For a lower breakfast base, a plain fresh bun or toast without cultured dairy tends to sit lower in histamine.

This rating comes from Sonic's own published ingredient statement, read on August 23, 2026. Restaurant recipes vary by location and change over time, so always check the current listing: source 1, source 2. How we rate foods →

Sonic Biscuit and Sonic are trademarks of their respective owners. This page is an independent histamine reference and is not affiliated with, endorsed by, or sponsored by the brand.