Start with the exact item and size
Ingredients and preparation can differ across burgers, fried sides, drinks, shakes and limited-time products.
Read the peanut caution
SONIC burger and sandwich pages include a peanut cross-contact warning. Treat it as a preparation-risk signal, not a minor footnote.
Check shared equipment
Fryers, grills, utensils, blenders, storage and preparation surfaces can create cross-contact even when an ingredient is removed.
Ask the selected drive-in
Explain the specific allergen and item before ordering. Staff can describe current local procedures but cannot create a universal guarantee.
Use conservative decisions
When the risk cannot be controlled or clearly answered, choose a safer alternative rather than relying on this independent summary.
Use this guide with the menu database
Open the full menu, filter to the relevant category and compare two or three detailed item pages. Then rebuild the intended order at the exact store and channel you will use. This sequence gives a more reliable answer than copying a national-looking price from a snippet.
Frequently asked questions
Does removing an ingredient make the item allergen-free?
Why is peanut cross-contact highlighted?
Are fried items prepared separately?
Can a shake share equipment?
Is this page medical advice?
Should I rely on an old allergen PDF?
Who makes the final decision?
What should I tell staff?
Official source and local-price notes
Official menu: Open the official Sonic Drive-In menu.
Scope: Official SONIC U.S. menu, sitemap, FAQ, rewards, nutrition and allergen resources; the selected drive-in controls price, hours, participation and availability.