A Tips.net article suggests five ways to get rid of a burnt food smell. They include getting the burnt food out of the house, opening doors and windows, using air fresheners, boiling lemons and cloves, and baking.
Instead of throwing away burnt food in the trash can in the kitchen, make an eco-friendly compost pile outside of the house. Open all doors and windows, and let fresh air in. To circulate the air faster, bring out all the electrical fans and turn them on beside open doors and windows.
Baking something is another way to remove burnt food smells in the house, as the new scent overpowers and helps hide the odor. In addition, use air fresheners to remove the odor, or boil slices of lemons and cloves.