Preheat the oven. Preheat oven to 350°F (175°C) with the rack in the center. Then, prepare 2 cookie sheets with parchment paper or cooking spray.
Mix the wet ingredients. Beat the butter and sugars with an electric mixer at medium speed until they become light and fluffy, which should take about 3-5 minutes. Then, add the eggs and vanilla extract and mix until they're well combined, making sure to scrape down the sides of the bowl if needed.
Combine dry ingredients. In a separate mixing bowl, combine the flour, baking soda, and salt. Then, add this to the butter mixture slowly, one cup at a time. Make sure to scrape down the bowl and mix in the chocolate chips, caramel pieces, and crushed pretzels.
Scoop and bake. Scoop 1/4 cup of cookie dough onto the prepared cookie sheets, with 6 cookies on each sheet. (You may need to bake in batches.) Cook at 350°F (175°C) for 14-17 minutes or until the edges turn golden brown. Let them cool on wire racks.