01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, baking soda, and salt.
03 - In a large mixing bowl, cream together butter, brown sugar, and granulated sugar until light and fluffy, about 2 minutes.
04 - Beat in eggs one at a time, then stir in vanilla extract.
05 - Gradually mix in dry ingredients until just combined.
06 - Gently fold in candy-coated chocolates, pretzel pieces, rice cereal, white chocolate chips, marshmallows, sprinkles, and nuts if using.
07 - Drop heaping tablespoons of dough onto prepared baking sheets, spacing them 2 inches apart.
08 - Bake for 9 to 11 minutes, until edges are lightly golden. Centers will look slightly underbaked.
09 - Cool on the baking sheets for 5 minutes before transferring to a wire rack to cool completely.