In a small bowl, combine the dried parsley, dill weed, garlic powder, onion powder, kosher salt, and black pepper. Stir to combine and set aside.
Pat the chuck roast dry with a paper towel, then rub the seasoning blend generously over all sides of the roast, pressing it in so it sticks.
Set the chuck roast in the bottom of your slow cooker. Pour the beef broth, Worcestershire sauce, and pepperoncini jar juice around the base of the roast, not over the top, so the seasoning stays put.
Arrange the pepperoncini peppers around and on top of the roast, then scatter the small squares of butter evenly over the top.
Place the lid on the slow cooker and cook on low for 8–10 hours, until the roast is fall-apart tender and shreds easily with two forks.
Use two forks to shred the roast directly in the slow cooker, then toss it in the juices at the bottom. After you shred the meat, let it sit in the juices for 15-20 minutes to soak up more flavor.
Notes
Save time/prep ahead: Mix your dry seasoning blend (parsley, dill, garlic powder, onion powder, salt, and pepper) up to a week in advance and store it in a small jar so it's ready to rub on the beef during a busy morning.
Dietary variations: This recipe is naturally gluten-free and dairy-free friendly. To make it completely dairy-free, simply swap the two tablespoons of unsalted butter for your favorite plant-based butter alternative or omit it entirely. Ensure the Worcestershire sauce you use is gluten-free for a gluten-free option.
The recipe can be found on My Fitness Pal by searching "BWB Mississippi Pot Roast From Scratch." The nutrition content provided for each recipe is an estimate created through the My Fitness Pal database. Please be aware that the nutritional content of each recipe may vary based on the products you use, the precision of your measurements, and the source you use to obtain nutrition data. While we try to provide accurate information, we give no guarantee regarding the accuracy of the nutritional information provided.