BOSTON (TheBlaze/AP) — It’s the kind of smell that understandably sends skyward the heart rates and collective blood pressure of passengers and airline crews.

(Image source: Getty Images)

(Image source: Getty Images)

Smoke in the cabin.

After those onboard American Airlines Flight 1532 — bound for Miami from Boston — began smelling smoke, their 6:36 a.m. takeoff turned into a 7:10 a.m. return to Beantown on Sunday.

The culprit?

Bread crumbs burning in an oven.

The oven was cleaned, and the flight — with 150 passengers and five crew members — headed back to Miami at 8:20 a.m.