No Bake Chex Cookies

1 cup granulated sugar 1 cup corn syrup 1 tsp. pure vanilla extract 1½ cups creamy peanut butter 5 cups Chex cereal 2 cups mini marshmallows Line two baking sheets with parchment paper. In large bowl, place Chex cereal and set aside. In medium saucepan, add sugar and corn syrup. Bring to low boil, stirring frequently. Add peanut butter and stir until fully incorporated and smooth. Add vanilla and marshmallows. Stir until marshmallows are melted. Remove from heat. (If you prefer to have some marshmallow pieces, remove from heat right after peanut butter is incorporated and just barely stir.) Pour mixture over cereal in bowl. Stir well, making sure each piece is well coated. If it seems like there is too much mixture, add extra cereal ½ cup at a time. Drop spoonfuls onto prepared baking sheets. Mixture will be incredibly sticky and you must work quickly as it will be harder to work with as it starts to cool.