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

2. In a large bowl, beat the softened butter, brown sugar, and granulated sugar until 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 mixture and mix just until a soft dough forms.

6. Fold in the chocolate chips, white chocolate chips, crushed pretzels, and most of the candies.

7. Press the dough evenly into the prepared pan and top with the remaining candies, extra pretzels, and sprinkles.

8. Bake for 24 to 28 minutes, or until the edges are golden and the center is set but still soft.

9. Cool completely in the pan before lifting out and slicing into bars.