While granite resists heat and does not burn, a hot pan or pot may leave a mark on its surface. Treat burn marks with mild soap and water or a homemade granite-safe poultice.
Clean the Countertop
Sometimes, the burn mark is a superficial sooty or food-based stain that can be cleaned off as soon as the granite cools. Wipe down the countertop with a squirt of mild dish soap on a damp soft cloth or sponge. Rinse the cloth or sponge and wipe the area again; then pat it dry with a soft cloth. If the mark disappears, your work is complete. Otherwise, you may need to make a simple poultice to treat the spot.
Make a Stain Poultice
If the burn mark came from a cigarette, incense or any substance that may have left a bit of a burnt residue embedded in an unsealed area of the granite, use a poultice to lift the stain away.
Pour enough flour in the a bowl to completely cover the burned area. Use slightly more than you think you may need.
Pour in some hydrogen peroxide, stirring it with a plastic scraper, until the mixture has the consistency of a creamy peanut butter.
Spread the paste over the burn mark with the plastic scraper. Spread the paste 1/4 inch or so beyond the discolored area.
Cover the paste with plastic wrap; then poke a few holes in the wrap near the paste. Use a toothpick to poke the holes.
Tape the edges of the plastic wrap down with painter's tape. Remove the plastic wrap and tape after 24 hours or once the paste dries.
Scrape off the paste residue with the plastic scraper; then wipe the area clean with a damp cloth or sponge.
If the granite looks dull or seems to absorb every liquid spilled upon it, a sealer helps restore its finish and protect the stone. Spray a granite sealer over a clean granite countertop, allowing it to soak in for 10 minutes or as long as the sealer packaging indicates. Buff the area with a soft white cloth, then allow the sealer to cure for six hours or longer before setting items upon the countertop.