1. Preheat the oven to 350°F and line a 9×13-inch baking pan with parchment paper or lightly grease it.

2. In a large bowl, beat the softened butter, brown sugar, and granulated sugar until light and creamy.

3. Add the eggs one at a time, then mix in the vanilla extract until smooth.

4. In a separate bowl, whisk together the flour, baking soda, and salt.

5. Add the dry ingredients to the wet ingredients and stir just until a thick cookie dough forms.

6. Fold in the semi-sweet chocolate chips, white chocolate chips, candy-coated chocolates, pretzels, potato chips, and mini marshmallows, reserving a small handful for the top if desired.

7. Press the dough evenly into the prepared pan and sprinkle the reserved mix-ins over the top.

8. Bake for 24 to 28 minutes, until the edges are golden and the center is just set.

9. Cool completely in the pan before slicing into bars.