Flour should NEVER be used to extinguish a grease fire. It could be ignited, making matters worse. Baking powder and baking soda are NOT the same thing, and like flour, will make a fire worse.Click to see full answer. Just so, should you put flour on a grease fire? Do NOT use flour on a grease fire. While sometimes baking soda can extinguish a small grease fire (though not if the fire is too overwhelming), flour cannot and should not be used. Due to chemical risk of contaminating your kitchen, putting out a grease fire with your fire extinguisher should be the last resort.Also, can you use fire extinguisher on grease fire? Pour on Baking Soda – Baking soda will extinguish grease fires, but only if they’re small. It takes a lot of baking soda to do the job. Spray the Pot with a Class B Dry Chemical Fire Extinguisher – This is your last resort, as fire extinguishers will contaminate your kitchen. Also to know is, can you put flour on a fire? If the fire is small, cover the pan with a lid and turn off the burner. Throw lots of baking soda or salt on it. Never use flour, which can explode or make the fire worse. Smother the fire with a wet towel or other large wet cloth.What do you put on a grease fire? If a grease fire starts: Cover the flames with a metal lid or cookie sheet. Turn off the heat source. If it’s small and manageable, pour baking soda or salt on it to smother the fire. As a last resort, spray the fire with a Class B dry chemical fire extinguisher. Do not try to extinguish the fire with water.